Vehicle Gear

Girodisc Rear Brake Rotors – Hyundai Veloster / Elantra / Kona / i30 N The Girodisc A2-217 Rear Rotor Kit offers a direct bolt-on performance upgrade for Hyundai’s high-performance N models, including the Veloster N, Elantra N, Kona N, and i30 N. These lightweight two-piece rotors are designed to deliver exceptional cooling, reduced unsprung weight, and race-level consistency without compromising everyday drivability or OEM compatibility. Precision Engineering for Hyundai’s N Performance Line Each Girodisc A2-217 rotor combines a CNC-machined 6061-T6 aluminum hat with a proprietary cast-iron friction ring. The two-piece floating design allows the rotor to expand and contract freely under heat, maintaining perfect alignment and preventing cracking or warping. The curved-vane internal geometry acts as a centrifugal air pump, drawing cooling air through the rotor for maximum temperature control under demanding conditions. Features • Direct-fit upgrade for Hyundai Veloster N, Elantra N, Kona N, and i30 N• Two-piece floating rotor design: cast-iron ring + 6061-T6 aluminum hat• Curved-vane internal design improves airflow and cooling efficiency• Floating mount system with cadmium-plated drive pins and anti-noise spring washers• Lightweight aluminum hat reduces unsprung and rotational mass• Retains OEM brake bias and ABS calibration• Reusable hats—replace only the iron rings when worn• Sold/priced per pair Vehicle Fitment • Hyundai Veloster N – Rear• Hyundai Elantra N – Rear• Hyundai Kona N – Rear• Hyundai i30 N – Rear• Compatible with OEM calipers and hardware• Direct bolt-on installation; no modifications required Girodisc A2-217 Rear Rotors – Hyundai Veloster / Elantra / Kona / i30 N FAQs Do these rotors fit stock calipers? Yes. The Girodisc A2-217 rear rotors bolt directly to OEM calipers, maintaining factory brake bias and ABS performance. What benefits do two-piece rotors provide? The two-piece floating design improves cooling, reduces weight, and allows for thermal expansion without warping, ensuring consistent braking under repeated heavy use. Will these make noise? No. The anti-noise spring washers prevent rattling when cold while allowing full float during high-temperature operation. Are replacement rings available? Yes. Girodisc offers replacement cast-iron rings so you can reuse your aluminum hats, lowering maintenance costs. How do these compare to OEM rotors? Girodisc rotors are lighter, stronger, and run cooler than OEM units, offering smoother pedal feel and superior fade resistance. Are these sold as a pair? Yes. The Girodisc A2-217 rotors are sold and priced as a matched rear pair. Enhance your N-car braking performance with the Girodisc A2-217 2-Piece Rear Brake Rotors—engineered for the Hyundai Veloster, Elantra, Kona, and i30 N to deliver race-level durability and street-ready refinement.

Kia Stinger GT / Genesis G70 Front Rotors Upgrade your Kia Stinger GT or Genesis G70 braking system with Girodisc’s precision-engineered 2-piece floating front rotors. Designed as a direct bolt-on replacement for the factory discs, these rotors deliver exceptional cooling, lighter weight, and fade-free performance without altering your car’s ABS or brake balance. Whether you drive daily or push hard on track, Girodisc rotors give you consistent, confident stopping power every time. Lightweight Strength, Race-Bred Design Machined and assembled entirely in the USA, Girodisc rotors combine aerospace-grade materials with motorsport engineering. The central hat is CNC-machined from 6061-T6 aluminum, anodized for long-term corrosion resistance. The iron rings are cast from Girodisc’s proprietary high-carbon alloy, featuring 48 curved directional vanes that pump cooling air through the disc like a centrifugal fan. This advanced ventilation dramatically improves heat dissipation, helping prevent fade and prolonging both rotor and pad life. Girodisc A1-204 Vehicle Fitment Kia Stinger GT (2018+) Genesis G70 (3.3T and 2.0T Sport models, 2019+) Features Direct OEM Fitment: Installs using factory hubs and calipers—no modifications needed. 48-Vane Curved Design: Directional internal vanes force air through the rotor for consistent cooling and fade resistance. Two-Piece Floating Construction: Reduces unsprung mass for sharper turn-in and suspension response. Floating Mount System: High-strength steel pins and anti-noise washers allow heat expansion without rattle or vibration. Replaceable Rings: Keep the aluminum hats—just replace the iron rings when worn to save on maintenance costs. Made in the USA: Designed, cast, and machined in-house at Girodisc’s Washington facility for unmatched precision. FAQs – Girodisc A1-204 Kia Stinger GT / Genesis G70 Front Rotors Are these rotors a direct fit for OEM calipers? Yes. They bolt directly to the stock calipers and hubs with no modifications required. Will these rotors improve braking feel? Definitely. Reduced weight and improved ventilation result in a firmer, more responsive pedal under repeated braking. Are they suitable for both street and track use? Absolutely. Girodisc rotors are engineered for smooth street manners and outstanding track endurance. Do they make any noise? No—the floating mount system uses anti-noise spring washers to prevent clatter or vibration. Take control of every stop with Girodisc’s lightweight 2-piece floating rotors for the Kia Stinger GT and Genesis G70. Designed for precision, cooling, and reliability, they deliver confidence-inspiring braking performance on the road and at the limit.

Hyundai Veloster N Front Rotors Unlock the full braking potential of your Hyundai Veloster N with Girodisc’s lightweight 2-piece floating front rotors. Designed as a direct bolt-on replacement for factory discs, these rotors drop right in with no modifications required. They maintain your OEM brake balance and ABS tuning while delivering smoother pedal feel, faster heat recovery, and reduced fade during aggressive driving or track days. Engineered for the Street and the Circuit Built in the USA with precision and purpose, each Girodisc rotor combines aerospace-grade materials with motorsport design. The hat is CNC-machined from 6061-T6 aluminum for strength and weight savings, while the rotor rings are cast from Girodisc’s proprietary high-carbon iron alloy for superior heat resistance and stability. The curved internal vane structure draws cool air through the disc to regulate temperature, ensuring consistent braking performance lap after lap. Vehicle Fitment Hyundai Veloster N (2019-present) Hyundai i30 N (international markets) Features Direct OEM Fitment: Bolts directly to factory hubs and calipers—no modifications or adapters needed. Lightweight Two-Piece Design: Reduces unsprung and rotating mass for improved suspension response and braking consistency. Curved Vane Ventilation: Directional internal vanes act as a centrifugal pump, maximizing cooling airflow under repeated heavy braking. Floating Mount Hardware: Utilizes high-strength steel pins with anti-noise spring washers to allow precise expansion while remaining quiet. Serviceable Construction: Replace the cast-iron rings when worn and reuse the anodized aluminum hats to reduce long-term cost. Made in the USA: Designed, cast, and machined in-house under strict quality control. FAQs – Hyundai Veloster N Front Rotors Will these fit my factory Brembo calipers? Yes, they’re engineered to bolt directly to OEM Veloster N calipers with no adjustments required. Do these rotors make noise? No—the floating system uses anti-rattle spring washers to keep them quiet under all conditions. Can I daily drive with these? Absolutely. They’re quiet and smooth for daily use but strong enough for heavy track braking. How much lighter are they than stock? The two-piece design saves several pounds per corner, improving turn-in and suspension compliance. Enhance your Hyundai Veloster N with Girodisc’s 2-piece floating front rotors—built to stay cool, stop hard, and deliver confidence on every road and every track session.

Girodisc Audi with Brembo 18Z Front Rotors These Girodisc A1-309 two-piece front rotors are purpose-built for Audi models using the Brembo “18Z” 6-piston caliper (Cayenne/Q7/Touareg sourced). They bolt to the car and work with 18Z calipers while reducing unsprung weight and improving cooling versus one-piece rotors. Vehicle Fitment Audi S4 (B5) – Front, with Brembo 18Z caliper conversion Audi A6 (C5) 2.7T – Front, with Brembo 18Z caliper conversion Audi Allroad (C5) 2.7T – Front, with Brembo 18Z caliper conversion Fitment note: Minor clearancing on the bottom of the upright is required on C5 chassis per Girodisc instructions. Will not fit C5 A6 4.2 V8, RS6, or Allroad 4.2 V8. Lightweight, High-Flow Design High-carbon iron rings with curved internal vanes act as a centrifugal pump to draw cooling air through the disc. Reusable 6061-T6 aluminum hats and cadmium-plated drive pins control thermal growth while keeping street noise in check. Features Direct fit for 18Z caliper swaps on B5 S4 / C5 2.7T (A6, Allroad) Two-piece floating construction reduces unsprung weight High-carbon rings, curved vanes for efficient cooling Reusable aluminum hats; new hardware included Manufactured and assembled in Bellingham, WA Sold/priced per pair A1-309 FAQs Will these fit C5 4.2 V8 or RS6? No. These are for B5 S4 and C5 2.7T cars only when running 18Z calipers. Is any modification needed? On C5 chassis, Girodisc specifies minor upright clearancing; a guide/video is provided. Do I need different brake lines or brackets? No additional lines or brackets are required for standard 18Z swap geometry. What rings do I use later? Use D1-309 front replacement rings. Related Products D1-309 Girodisc Audi with Brembo 18Z Front Replacement Rings

Girodisc Mercedes 365x26mm Rear Replacement Rings (Dimpled & Slotted) Restore your Mercedes’ braking performance with Girodisc D2-170DS 365x26mm dimpled and slotted rear replacement rings. Designed as direct replacements for Girodisc two-piece rotors, these precision-engineered rings combine enhanced cooling with improved pad bite and reduced fade under hard braking. Vehicle Fitment Compatible with:• Mercedes-Benz S63 AMG (W222, W221)• Mercedes-Benz CL63 AMG (C216)• Mercedes-Benz SL63 AMG (R231)• Mercedes-Benz CLS63 AMG (C218)Note: These are friction rings only. They attach to existing Girodisc aluminum hats using the included floating hardware kit. Precision Machined for High-Performance Braking Each Girodisc ring is cast from a proprietary high-carbon iron alloy and machined in-house in the USA. The curved internal vanes act as centrifugal pumps to maximize airflow through the rotor, significantly improving heat dissipation during repeated heavy braking. The dimpled and slotted surface increases pad bite and keeps the braking face cleaner for consistent performance on both road and track. Features • Direct replacements for Girodisc 365x26mm rear rotors• Dimpled and slotted design enhances pad bite and debris removal• High-carbon iron alloy for improved heat resistance• Directional curved vanes provide superior cooling• Precision machined and balanced in the USA• Includes new floating hardware kit• Sold/priced per pair Specifications • Diameter: 365mm• Thickness: 26mm• Position: Rear• Material: High-carbon cast iron• Includes: Two rotor rings and complete hardware kit• Finish: Dimpled and slotted surface• Made in the USA• Sold/priced per pair Girodisc D2-170DS Replacement Ring FAQs Will these fit OEM Mercedes rotors? No. These rings are designed exclusively for Girodisc two-piece rotor assemblies. What’s the advantage of the dimpled and slotted design? It improves initial pad bite, helps expel gases, and maintains consistent friction levels during repeated braking cycles. Are these suitable for daily driving? Yes. Girodisc rotors offer quiet operation on the street while providing race-level performance when pushed hard. Do they come with new hardware? Yes. Each set includes a complete hardware kit with new drive pins, bolts, and washers for easy installation. Upgrade or refresh your AMG’s braking system with Girodisc D2-170DS rear replacement rings — the ideal balance of precision, durability, and performance for the world’s best performance sedans and coupes.

Girodisc Mercedes E63, GT53 Rear Replacement Rings (Dimpled & Slotted) Upgrade your AMG’s braking confidence with Girodisc dimpled and slotted rear replacement rings for the Mercedes E63 and GT53. These high-performance rotors are direct replacements for Girodisc’s two-piece assemblies, designed to restore race-ready bite, consistent thermal control, and responsive pedal feedback on both street and track. Vehicle Fitment Compatible with:• Mercedes-AMG E63 (W213)• Mercedes-AMG GT53 (C257 / X290)Note: These are replacement friction rings only. They mount directly to existing Girodisc aluminum hats using the included hardware kit. Precision Engineering Meets AMG Performance The Girodisc D2-248DS rings are machined from high-carbon cast iron and feature a dimpled and slotted face pattern for enhanced pad cleaning and outgassing under extreme heat. The curved internal vanes pump air through the rotor to maintain stable temperatures and reduce fade. Made entirely in the USA, Girodisc rings are the ultimate solution for repeatable, fade-free braking performance. Features • Dimpled and slotted surface for improved pad bite and cooling• Direct replacements for Girodisc two-piece rear rotor assemblies• High-carbon iron construction with directional curved vanes• Includes full replacement hardware kit• Designed for Girodisc aluminum hats only• Precision-machined and balanced in the USA• Sold/priced per pair Specifications • Application: Rear axle• Vehicles: Mercedes-AMG E63, GT53• Material: High-carbon cast iron• Design: Dimpled and slotted• Includes new hardware• Made in the USA• Sold/priced per pair Girodisc D2-248DS Replacement Ring FAQs What’s the advantage of dimpled and slotted rotors? The combination design helps evacuate gases and debris from between the pad and rotor, improving initial bite and maintaining friction consistency under heavy braking. Can I reuse my Girodisc aluminum hats? Yes, these rings are designed to bolt directly to your existing Girodisc hats using the supplied hardware kit. Do they fit OEM Mercedes rotors? No. These replacement rings are engineered exclusively for Girodisc two-piece rotor systems. Are these suitable for daily driving? Absolutely. Despite their motorsport pedigree, Girodisc rings maintain smooth, quiet operation during normal street use while offering superior heat management for spirited or track driving. Give your Mercedes-AMG E63 or GT53 the braking precision it deserves with Girodisc D2-248DS dimpled and slotted replacement rings — the perfect balance of street comfort and track endurance.

D1-308DS Girodisc Mercedes 360mm Front Replacement Rings (Dimpled & Slotted) These Girodisc D1-308DS front replacement rings are sold in pairs and include replacement hardware. They are designed for use with existing Girodisc aluminum hats and are not compatible with OEM or other aftermarket hats. Vehicle Fitment Mercedes models with Girodisc 360 mm front rotor kits Not for 370 / 380 / 390 mm systems Refresh Your Two-Piece Rotor Setup Dimpled and slotted high-carbon iron rings deliver strong initial pad bite and stable performance under heat. Reusing your Girodisc hats keeps service costs down while maintaining braking performance. Features Replacement rings only; reuse Girodisc aluminum hats Sold in pairs with replacement hardware Dimpled & slotted surface for bite and gas evacuation High-carbon iron with 48 curved vanes for cooling Cost-effective rotor refresh solution D1-308DS Girodisc Mercedes 360mm Front Replacement Rings FAQs: Do these include hats? No, these are rings only and require existing Girodisc hats. Are they sold individually? No, they are sold as a pair. Can I use OEM hats? No, these rings are only compatible with Girodisc hats. Are these track-ready? Yes, they offer excellent cooling and bite for performance driving.

Girodisc GD380.32.52 380x32mm Replacement Rotor Rings (D52) The Girodisc GD380.32.52 Replacement Rotor Rings (D52) are designed as direct replacements for worn rotor rings in your existing Girodisc two-piece brake system. Manufactured in-house to the same exacting standards as all Girodisc components, these 380x32mm rings restore your braking performance while allowing you to reuse your original aluminum hats and hardware. Restore Peak Braking Performance Each Girodisc replacement ring is cast from Girodisc’s proprietary iron alloy in the USA and precision machined to exacting tolerances. The curved vane internal design functions as a centrifugal air pump, improving airflow and heat dissipation to keep temperatures consistent lap after lap. These replacement rings include new hardware and are ready to bolt directly onto your existing Girodisc hats. Features • Size: 380mm x 32mm (D52)• Direct replacement rotor rings for Girodisc two-piece systems• Compatible with Girodisc aluminum hats using D52 pattern• Proprietary cast iron alloy poured and machined in the USA• Curved vane internal geometry for maximum cooling efficiency• Includes new hardware kit for installation• Reuses existing aluminum hats• Sold/priced per pair Vehicle Fitment The Girodisc GD380.32.52 Replacement Rotor Rings (D52) fit multiple Girodisc brake systems used on high-performance vehicles, including:• Porsche 997.2 Turbo / Turbo S• Porsche 991 Carrera / Carrera S (with Girodisc 380mm upgrade kit)• Audi R8 V8 / V10 (with Girodisc 380mm rear kit)• McLaren 540C / 570S / 570GT (with Girodisc D52-based systems)• BMW F8X M2 / M3 / M4 (with Girodisc 380mm retrofit kits)Always confirm your hat pattern and bolt circle match the D52 specification before ordering. Girodisc GD380.32.52 380x32mm Replacement Rotor Rings (D52) FAQs What is included with these replacement rings? The kit includes two 380x32mm iron rotor rings (left and right) along with all new hardware for installation. Can I reuse my existing aluminum hats? Yes. These replacement rings are designed to bolt directly to your Girodisc aluminum hats using the provided hardware. Are the rings directional? Yes. Each rotor has directional curved vanes—ensure left and right sides are installed correctly for proper cooling airflow. What materials are used? The rings are made from Girodisc’s proprietary cast iron alloy, known for high heat capacity, durability, and consistent friction performance. Do these fit OEM or other aftermarket hats? No. Girodisc replacement rings are engineered specifically for Girodisc hats and may not fit other brands’ hardware or bolt patterns. Are they sold individually or as a set? The Girodisc GD380.32.52 380x32mm Replacement Rotor Rings (D52) are sold and priced per pair, including all required installation hardware. Maintain peak braking performance with genuine Girodisc GD380.32.52 Replacement Rotor Rings (D52)—crafted in the USA for reliability, strength, and precision fitment.

380x34mm Replacement Rings for Brembo Wide Annulus (D62) Renew your Brembo big brake kit’s stopping performance with the Girodisc GD380.34.62BR Replacement Rings. Designed as a direct replacement for 380x34mm Brembo wide annulus two-piece rotors, these precision-machined rings deliver exceptional thermal stability, strength, and fade resistance under demanding street or track use. Manufactured in the USA from Girodisc’s proprietary high-carbon cast iron alloy, each ring is engineered to handle high heat cycles and extreme braking forces without distortion or cracking. The D62 wide annulus design matches Brembo’s 62mm pad contact area, ensuring maximum pad engagement and consistent braking performance lap after lap. Features and Benefits Direct replacement rings for 380x34mm Brembo big brake kits using a 62mm wide annulus pad Bolts directly to existing Brembo aluminum hats using original hardware Machined from proprietary U.S.-poured high-carbon cast iron for superior heat capacity 48 curved directional vanes maximize airflow and cooling efficiency Lightweight two-piece floating design reduces unsprung weight and improves brake response Fully machined, balanced, and assembled in the USA Hardware Information These rings bolt to the existing Brembo hats using the factory hardware. New hardware is not included with this set but can be sourced if your existing fasteners show wear or damage. Compatibility Fits Brembo big brake kits featuring 380x34mm rotors with a 62mm wide annulus pad design. Compatible with both street and track-oriented Brembo systems using two-piece floating rotor assemblies. Why Choose Girodisc Girodisc combines racing heritage with cutting-edge engineering to deliver replacement components that outperform OEM parts. The GD380.34.62BR rings restore your Brembo system’s braking precision and consistency while maintaining the lightweight performance benefits of your existing hats. Each ring is heat-treated and balanced for dependable, fade-free performance under extreme braking conditions. FAQs Do these include the aluminum hats?No. The GD380.34.62BR kit includes only the rotor rings. You will reuse your existing Brembo hats. Is hardware included?No. These rings bolt to your Brembo hats using your existing hardware. Replacement hardware can be ordered separately if needed. Are these compatible with OEM rotors?No. These are designed exclusively for 380x34mm Brembo big brake kits using a 62mm wide annulus pad and will not fit OEM one-piece rotors. Are they directional?Yes. Each ring features curved internal vanes and must be installed on the correct side for optimal cooling and airflow. Ready to Refresh? When it’s time to restore the braking precision of your Brembo big brake kit, the Girodisc GD380.34.62BR 380x34mm Replacement Rings deliver the performance, durability, and cooling efficiency you expect. Order your set today from Competition Motorsport and get your system back to race-ready perfection.

380x28mm Replacement Rotor Rings (D54) Refresh your Girodisc braking system with the GD380.28.54 Replacement Rings, designed for the D54 380x28mm two-piece rotor assemblies. When your existing Girodisc rotors reach their wear limit, these precision-engineered replacement rings restore braking performance, cooling efficiency, and stopping confidence—without the need to replace your aluminum hats. Each ring is precision-machined in the USA from Girodisc’s proprietary high-carbon cast iron alloy, delivering exceptional thermal stability, strength, and fade resistance under the most demanding driving conditions. Whether on the street or at the track, these 380x28mm rings keep your braking consistent, smooth, and powerful lap after lap. Features and Benefits Direct replacements for Girodisc D54 380x28mm two-piece rotors Machined from proprietary U.S.-poured high-carbon cast iron for superior durability 48 curved directional vanes maximize airflow and cooling capacity Lightweight two-piece design reduces unsprung mass and improves suspension response Includes all new drive pins, bolts, and washers for installation Fully machined, balanced, and assembled in the USA Compatibility Designed exclusively for Girodisc D54 380x28mm rotor assemblies. These rings are only compatible with Girodisc aluminum hats and are not designed for use with OEM or other aftermarket two-piece rotor systems. Why Choose Girodisc Girodisc is trusted worldwide for precision-engineered braking components that excel under heat and stress. The GD380.28.54 replacement rings embody the brand’s motorsport heritage, ensuring consistent pedal feel, superior cooling, and long-lasting performance. Replacing just the rings instead of the entire rotor system saves cost while preserving the exceptional quality of your Girodisc setup. FAQs Do these include the aluminum hats?No. The GD380.28.54 kit includes only the iron rotor rings and a complete hardware kit. Your existing Girodisc hats are reused. Are these compatible with OEM rotors?No. Girodisc replacement rings are designed solely for Girodisc two-piece rotors and will not fit OEM or other aftermarket assemblies. Are they directional?Yes. Each ring features curved internal vanes that must be installed on the correct side for proper cooling and airflow. What’s included?A pair of 380x28mm rotor rings (left and right) and a full hardware kit including drive pins, bolts, and washers. Ready to Refresh? Bring your Girodisc system back to full braking performance with the GD380.28.54 380x28mm Replacement Rings. Designed for high-performance street and track use, they deliver the strength, balance, and cooling efficiency that define Girodisc. Order your set today from Competition Motorsport and keep your braking power at its absolute best.

AP Racing 350x28mm Replacement J Hook Front Floating Racing Brake Rotors Fit The Following Cars (w/ OEM Iron Rotors)- Center hat Excluded, rotor discs and hardware only. Replacement Disc Only For AP Racing 13.01.20043 Fit The Following Cars (w/ OEM Iron Rotors) Corvette C8 Z51 Rear AP Racing by Essex 2-piece Competition J Hook Rear disc pair for Corvette C8 Z51 with iron discs 350mm x 28mm (13.78" x 1.10") 72 Vane, D66 Huge increase in airflow, cooling capacity, and durability vs. OEM discs Saves 2 lbs. unsprung weight per side vs. OEM iron discs Designed for: club racing, time trial, auto-x, HPDE Works with OEM calipers, no modifications required Ultralight, fully floating, anodized billet aluminum hat with float control/anti-rattle clips Sold/priced per pair of rotor rings (including hardware). AP Racing J Hook Brake Rotors – The Gold Standard in Track Day & Racing Performance Engineered for professional motorsport, HPDE, and dedicated track day use, AP Racing’s J Hook Brake Rotors deliver uncompromising performance, thermal stability, and consistent braking power. These two-piece, floating rotors are built to handle the extreme demands of road racing, with design features derived from over 50 years of elite competition—including Formula 1, NASCAR, and IMSA. Unlike conventional one-piece rotors, AP Racing’s two-piece floating design features a billet aluminum hat mated to a cast iron disc via precision-engineered bobbins. This setup allows for controlled radial expansion under high heat, minimizing distortion and coning. The result? More even pad wear, a firmer pedal feel, and longer component life, even during extended lapping sessions or endurance racing. Floating hardware includes anti-knockback spring clips that reduce piston retraction while eliminating common NVH issues like rattling. Why Choose AP Racing J Hook Rotors? Advanced Cooling, Superior Bite, Unmatched Durability At the heart of every rotor is AP Racing’s proprietary high-carbon iron alloy, developed to withstand repeated thermal cycling without cracking or warping. Internally, directional vanes—far superior to OEM pillar or straight vane designs—maximize airflow and cooling. With 60 to 84 vanes per rotor, AP Racing achieves faster heat evacuation, reduced brake fade, and a more consistent friction surface. These rotors are left/right-specific for optimal airflow and balance. The exclusive J Hook slot pattern offers enhanced initial bite and promotes uniform heat distribution across the rotor face, reducing pad deposits and vibration. Unlike drilled rotors or straight-slot competitors, the J Hook design provides cleaner pad transfer during bed-in and superior modulation under braking—ideal for serious drivers who demand feedback and control. Yes, you might hear a little more whirr, but you’ll gain the stopping power, consistency, and longevity your lap times demand. Premium Components, Affordable Performance The rotor hats are CNC-machined from 6061-T6 billet aluminum and hard anodized for strength and heat resistance. Scalloped edges under the hat further assist heat dissipation. All hardware is U.S.-made to AP Racing spec, the same quality found on pro-level racing platforms. And while these rotors are race-proven, they’re also surprisingly cost-effective to replace. Don’t settle for cheap rotors that crack after a weekend—AP’s J Hook rings offer better durability and real long-term value. Fewer replacements mean more track time, less downtime, and peace of mind knowing you're running the best. Used by Champions. Trusted by Experts. From endurance racers to HPDE enthusiasts, AP Racing brake rotors are trusted worldwide for their reliability, longevity, and performance under pressure. Whether you're shaving seconds off your lap time or building a dedicated track car, the J Hook delivers a professional-grade solution that won’t let you down.   AP Racing J Hook Brake Rotors for Auto Racing, Track Days & HPDE Why Rotor Design Matters: Heat Expansion and Floating Technology As with most metals, iron brake discs expand significantly under heat. When temperatures rise, the disc grows radially—expanding in both diameter and circumference. Traditional one-piece rotors struggle to accommodate this natural expansion. As the outer edge pulls away from the center under heat stress, it creates a condition called “coning”—a distortion that compromises pad-to-rotor contact. This distortion can lead to uneven pad wear, brake tapering, and an inconsistent, long brake pedal. AP Racing two-piece floating brake rotors are purpose-built to eliminate these issues. Engineered with “float” built into the disc or hat assembly, these rotors feature oblong-shaped mounting holes that allow the hardware to slide as the disc heats up. This flexibility ensures the disc runs true within the caliper under high-temperature loads, effectively reducing distortion, minimizing pad taper and stress cracks, and promoting longer component life. Custom Mounting Hardware & Anti-Knockback Spring Clips AP Racing rotors utilize application-specific, U.S.-made mounting hardware—not generic bolts. These premium components are the exact parts used in AP’s professional motorsport products, engineered to withstand the rigors of competitive racing. To manage lateral disc motion that can push caliper pistons backward (known as knockback), AP Racing integrates anti-knockback spring clips on alternating bobbins—five on a ten-bolt setup, six on a twelve-bolt disc. These clips keep the aluminum hat and iron disc ring properly aligned while still allowing for radial float. Bonus: they eliminate annoying rattles and vibrations, ensuring a quieter, more refined braking experience. High-Performance Hat Design for Heat Isolation The disc hats in AP Racing’s two-piece floating rotors are CNC-machined from 6061-T6 billet aluminum and finished with a hard anodized coating. This high-strength aluminum alloy was selected for its ability to maintain structural integrity even at elevated temperatures. AP adds scalloped channels beneath the hat to further encourage airflow and heat evacuation from the outer disc face, minimizing thermal transfer to hubs and wheel bearings—helping reduce maintenance costs on these expensive components. Internal Vane Engineering: Airflow Optimization & Thermal Stability AP Racing’s internal vane design sets them apart from OEM and most aftermarket competitors. While many factory brake discs use non-directional pillar vanes (low-cost and NVH-focused), AP Racing rotors use directional vanes engineered for maximum airflow. These rotors are side-specific—meaning you’ll receive a unique left and right disc in each set—ensuring optimized cooling through strategic vane orientation and shape. Beyond that, AP Racing rotors feature a superior vane count, typically ranging from 60 to 84 vanes, compared to 30–48 in most aftermarket rotors. After extensive CFD and thermal analysis, this high vane count was proven to: Increase airspeed and thermal transfer Reduce recirculation and deflection at the disc face Minimize coning, cracking, and brake fade Deliver more even pad contact and extended rotor life J Hook Slot Pattern: Exclusive to AP Racing Slots and drill holes may improve initial bite, but they also introduce “cool spots” in the rotor face—areas of uneven heating that can lead to stress risers, cracks, and pad vibration. OEM rotors often avoid this by leaving the disc face blank, but that compromises bite and brake feel. AP Racing’s patented J Hook design, developed through rigorous R&D, solves this problem. The hooks are meticulously spaced around the disc’s circumference and from hat to edge, forming a continuous distortion path that ensures even heat distribution. This encourages uniform pad deposits during bed-in, helps reduce judder and cracking, and improves consistency under repeated high-load braking. In addition, the J Hook slots provide more leading edges for pads to grip than traditional curved slots or blank rotors. While this might generate a mild whirring sound during braking, the benefits—more bite, cleaner bedding, better pedal feel—make it the top choice for committed racers and serious track day drivers. Metallurgy Backed by 50+ Years of Motorsport Leadership AP Racing's reputation is built on performance, and their proprietary iron alloy used in J Hook rotors is no exception. Drawing from over five decades of elite motorsport experience, including 750+ Formula 1 wins and widespread use across NASCAR, AP’s engineers have developed a disc alloy that excels under sustained racing temperatures and stress. Where OEM discs focus on affordability and mass production, AP Racing’s J Hook rotors are purpose-built for motorsport durability and heat resistance. Affordable Replacement Cost: Serious Value for Serious Drivers Even the best brake rotors are consumables. When you drive hard—especially at the track—your discs will eventually wear out. That’s why AP Racing designed their replacement iron rings to be cost-effective, allowing you to replace worn parts without breaking the bank. Compare that to constantly buying cheap $150 rotors every weekend—rotors that can't handle the heat and need to be swapped frequently. With AP Racing’s J Hook rotors, you get longer service intervals, less downtime, and better performance over time, making them an incredibly smart long-term investment. Proven on Track. Trusted by Champions. Top-tier racing teams rely on AP Racing J Hook rotors for one reason: they perform under pressure. Whether you're running time trials, attending HPDE events, or competing in wheel-to-wheel racing, these rotors offer professional-grade reliability, safety, and performance. Bedding and preparation of AP Racing J Hook Disc Properly preparing your new brake discs before heavy use is extremely important. The goal of bedding-in your brake pads and discs is to mate them together properly and prepare them for heavy use.  When prepared properly, or bed-in, your pads will transfer a thin layer of material to the disc face (transfer layer).  The pads in your caliper will then actually ride on that thin layer of pad material you’ve put down on the rotor, rather than rubbing directly on the iron rotor face.  A good transfer layer is going to give you superior brake pedal feel, less noise, superior pad wear, and lower the chances of cracking your discs. Important Notes- PLEASE READ! First, make sure you are on a closed course to perform a proper bed-in.  Do NOT perform the procedure on public roads.  You need a stretch of asphalt with long straights, good visibility, and no potential obstructions.  Make sure you are in a position to safely and repeatedly attain the necessary speeds to perform the bed-in procedure.  A controlled racetrack is the best place to perform this procedure.  AP Racing and Competition Motorsport in no way suggest or condone speeding on public roads or breaking the law in your car, nor do we take responsibility for any damage or injury that occurs as a result of using our product or these procedures.  You are performing the bed-in procedure at your own risk.  During these procedures, it’s critical that you never come to a complete stop with your foot on the brake pedal.  If you have brake ducts on your car, you may want to block them off to allow your brake system to heat up easily. The procedure outlined below is a generic procedure for most types of mild race pad.  Please check your pad manufacturer’s recommended bed-in procedure. Accelerate to approximately 60mph and then decelerate down to 5 mph.  If your car has ABS, you should try to hold the brakes at a point just before ABS intervention.  Once the car slows to 5mph, immediately accelerate back up to about 60mph, and brake again to roughly 5mph.  Repeat this series of stopping and accelerating 8 to 10 times.  Again, do not come to a complete stop with your foot on the brake pedal. Cool the brake system down by cruising at 45mph+ for 5 to 10 minutes. Visually inspect your discs.  They should be a blue/grey color (instead of shiny silver), and have an even layer of pad material across and around the entire rotor face. If the AP Racing rotors don’t have a layer of pad material on them, perform another series of stops in the manner outlined above.

Sparco QRT-R Racing Seat Ultra-lightweight QRT Technology At Its Best! The QRT-R is the first seat to feature Sparco’s patented QRT ultra-light technology. This QRT Technology gives an unparalleled mechanical strength/weight ratio for fiberglass composite racing seats. QRT Technology gives weight savings of 7 lbs to 10 lbs per shell. The main benefit is that QRT-R seat approaches the weight of a carbon fiber seat at a price of a fiberglass seat. The QRT-R is the lightest "Medium/Large" size fiberglass seat, the shell alone weighs only 9.9 lbs (or 15 lbs fully trimmed). The QRT-R has a unique CAD design that features a lower seating position that can fit a larger/taller driver with the exterior dimensions that can fit into smaller vehicles. The QRT-R is FIA 8855-1999 approved. Available in cloth. Requires the #600QRT side mount for proper mounting. Sparco QRT-R Racing Seat Key Features Lightest "Medium/Large" size fiberglass seat on the market Lower seating position that can fit taller/larger drivers Smaller outer dimensions for small vehicle fitment QRT Technology gives an average weight savings of 7lbs per shell FIA 8855-1999 approved Dimensions

Sparco Grid Q Racing Seat The Sparco Grid Q is engineered for superior lateral support, driver ergonomics, and safety. Its modular padding system uses individual Velcro-attached pads to fine-tune fit and create natural ventilation channels across the seating surface. A new shell design adds deep side bolsters and supportive shoulders for excellent hold under high-G loads. Built with Sparco’s QRT (Quick Resin Technology), the Grid Q achieves an ultra-light fiberglass composite shell while maintaining outstanding strength. Side cushions can be removed for additional hip room, and the harness slots accommodate a wide range of driver sizes. The Grid Q is FIA approved and HANS compatible. Sparco QRT Technology QRT delivers an exceptional strength-to-weight ratio, reducing shell weight by up to 30% versus traditional fiberglass methods—approaching carbon fiber performance at a more accessible price point. Features QRT ultralight fiberglass composite shell Deep side and shoulder bolsters for lateral support Modular Velcro padding with ventilation channels Removable side cushion for wider fit Harness slots fit a broad range of drivers HANS device compatible Fire-retardant, self-extinguishing upholstery with non-slip zones FIA 8855-1999 approved Dimensions

Sparco EVO QRT Racing Seats As Sparco's most well known competition seat, it was a no-brainer to provide the refreshed Evo with Sparco's QRT Ultra-Light Technology. Not content to leave well enough alone, Sparco went a step further by improving the overall fit and feel of the  Sparco Evo QRT. Starting with the shoulder bolsters, Sparco trimmed down the width to help them fit into smaller cars without sacrificing support. Sparco then lowered the side bolsters just enough to improve ingress/egress into/out of the car. Finally, the shoulder belt guides have been raised for improved harness fit in all drivers. With small sports cars in mind (the Sparco Evo QRT fits perfectly in a Miata!), the Sparco Evo QRT is sure be a mainstay at the track! The Sparco EVO QRT series of seats feature the most back angle rake of all Sparco seats for a very comfortable driving position. Available in cloth or vinyl. The Sparco EVO QRT is FIA approved. Sparco EVO QRT Racing Seat Sizes The Sparco EVO series is among the most versatile competition seats we carry, available in the following four sizes to ensure proper fitment: EVO S – Small (up to 32” waist) EVO – Medium (up to 34” waist) EVO L – Large (up to 36” waist) EVO XL – Extra Large (38” waist) What Is Sparco QRT Technology? Designed and developed at the Sparco OEM Composite Laboratory in Italy, QRT is a patented state-of-the-art technical process, based on aerospace technologies. QRT creates an unparalleled mechanical strength to weight ratio. This innovative production method generates the lightest fiberglass composite seat shells currently on the market; in fact, it guarantees a reduction in total weight of up to 30% compared to traditional production methods. The QRT seats approach the weight of a comparable carbon fiber seat at a lower price point. Sparco EVO QRT Racing Seat Features QRT ultra-light fiberglass composite shell Excellent fitment into small cockpits Four Sizes: Small through XL Excellent ergonomics Fire retardant fabric Special non-slip fabric FIA 8855-1999 approved Dimensions EVO S Dimensions: EVO Dimensions: EVO L / XL Dimensions: