GiroDisc Racing Brakes & Technologies
D1-291 GiroDisc Replacement Rotors (OEM Iron)
$1,620.00
Porsche 408x36mm Front Replacement Rings
Bring your Porsche’s braking system back to peak performance with the Girodisc D1-291 Front Replacement Rings. Designed for applications using 408x36mm Girodisc two-piece rotors, these rings deliver the same unmatched stopping power, thermal stability, and lightweight construction as your original setup—without the cost of new hats.
Each ring is CNC-machined from Girodisc’s proprietary U.S.-poured high-carbon cast iron alloy. The result is exceptional strength, cooling, and longevity for high-performance street and track use. Whether you’re driving your GT4 RS or GT3 RS at full throttle, these replacement rings ensure every lap, corner, and stop feels just as sharp as the first.
Features and Benefits
Direct replacements for Girodisc 408x36mm two-piece front rotors
Includes brand-new hardware—reuse your existing Girodisc aluminum hats
Manufactured from proprietary high-carbon cast iron for maximum heat capacity
48 curved directional vanes for superior airflow and cooling efficiency
Two-piece floating design reduces unsprung mass and improves handling response
Fully machined, balanced, and assembled in the USA
Vehicle Fitment
2022+ Porsche 718 Cayman GT4 RS (982) – with steel brakes
2023+ Porsche 911 GT3 RS (992) – with steel brakes
These replacement rings are designed exclusively for Girodisc aluminum hats and will not fit OEM or other aftermarket hat systems. They are not compatible with PCCB carbon-ceramic brakes.
Why Choose Girodisc
Girodisc brake systems are engineered for uncompromising performance. Each rotor ring is precision-machined, balanced, and tested to deliver consistent brake modulation and fade-free stopping power under extreme conditions. When your original rings reach their wear limit, these replacements let you refresh your braking system with OEM-level precision at a lower cost.
FAQs
Do these include the aluminum hats?No. The D1-291 kit includes only the rotor rings and new hardware. Your existing Girodisc hats are reused.
Can these be used with factory rotors?No. Girodisc replacement rings are specifically designed for Girodisc two-piece rotors and will not fit OEM or other aftermarket assemblies.
Are they directional?Yes. Each ring features curved internal vanes for optimized airflow and must be installed on the correct side for proper cooling performance.
What’s included?Two 408x36mm front rotor rings (left and right) plus a complete hardware kit with new drive pins, bolts, and washers.
Ready to Refresh?
Restore your Porsche’s braking confidence and consistency with Girodisc D1-291 Front Replacement Rings. Engineered for the 718 GT4 RS and 992 GT3 RS, these rings bring factory-level precision with motorsport-grade performance. Order your set today from Competition Motorsport and keep your Porsche braking at its absolute best.
GiroDisc Racing Brakes & Technologies
D1-302 Girodisc Lamborghini Huracán STO Front Replacement Rings
$1,577.00
Lamborghini Huracán STO Front Replacement Rings
Bring your Lamborghini Huracán STO’s braking system back to peak performance with Girodisc Front Replacement Rings. Designed as a direct replacement for the iron rotor surfaces on your existing Girodisc two-piece rotors, these rings allow you to retain your aluminum hats—saving cost, reducing downtime, and maintaining the precision balance your STO deserves. Each set includes new hardware for a perfect fit.
Motorsport-Grade Engineering
Every Girodisc ring is crafted in the USA from proprietary cast iron and precision machined for perfect balance and thermal stability. The curved vane design is developed through motorsport testing to act as a centrifugal air pump, pulling cool air through the rotor for consistent heat management and fade-free braking under extreme conditions.
Features
Sold as a pair and includes new replacement hardware
Direct replacement for Girodisc two-piece front rotors
Reuse your Girodisc aluminum hats to minimize cost
Made from proprietary U.S.-poured cast iron for strength and longevity
Curved vane design enhances cooling and reduces heat soak
Fully machined, balanced, and finished in the USA
Vehicle Fitment
2021–2025 Lamborghini Huracán STO (front axle equipped with Girodisc two-piece rotors)
Lamborghini Huracán STO Front Replacement Rings FAQs:
Do these fit OEM two-piece rotors? No. These rings are designed exclusively for use with Girodisc two-piece rotor systems and will not fit OEM or other aftermarket hats.
What’s included in the box? Two front replacement rings, new hardware, and installation instructions. You’ll reuse your existing Girodisc aluminum hats.
When should I replace the rings? Replace when the rotors reach minimum thickness or if any cracking, heat checking, or deformation is visible.
Should I replace both sides at once? Yes. Always replace both front rings simultaneously for balanced performance and even wear.
Can I install these myself? Experienced installers can perform the swap, but Girodisc recommends professional installation for correct torque specs and safety.
Are the rings balanced? Yes. Girodisc rings are precisely balanced for smooth, vibration-free braking right out of the box.
Please note: Girodisc replacement rings are designed for use only with Girodisc hats unless specifically stated otherwise.
GiroDisc Racing Brakes & Technologies
D1-307 Girodisc Front Replacement Rotor Rings
$1,262.00
Toyota GR Supra, BMW 348mm Front Replacement Rings
Restore your braking performance with the Girodisc D1-307 Front Replacement Rings, designed for the Toyota GR Supra and BMW Z4 M40i. These precision-engineered 348mm iron rotor rings are direct replacements for your existing Girodisc two-piece rotors, delivering the same championship-level performance, reduced unsprung weight, and thermal stability that make Girodisc the gold standard for performance braking.
Manufactured from Girodisc’s proprietary high-carbon cast iron alloy and machined in the USA, these rotors are built to handle extreme braking forces and high temperatures without fade. If your original Girodisc rotors have reached their wear limit, these replacement rings let you renew your braking setup while reusing your original Girodisc aluminum hats — saving cost without sacrificing quality.
Features and Benefits
Direct replacements for Girodisc 348mm front two-piece rotors
Crafted from proprietary U.S.-poured high-carbon cast iron
48 curved directional vanes maximize airflow and cooling
Lightweight two-piece design reduces unsprung mass
Includes all new hardware: drive pins, bolts, and washers
Engineered, machined, and balanced entirely in the USA
Vehicle Fitment
2020+ Toyota GR Supra (A90 / A91)
2019+ BMW Z4 M40i
BMW G29 Platform (B58 engine)
These rotor rings are designed exclusively for Girodisc aluminum hats and are not compatible with OEM or other aftermarket hat assemblies.
Why Choose Girodisc
Girodisc performance rotors are trusted by track enthusiasts and professional racers for their ability to handle high thermal loads while maintaining consistent braking feel. The D1-307 front replacement rings deliver the same performance and cooling benefits as a brand-new set — for a fraction of the price. Each ring is optimized for even heat distribution and minimal warping, giving you confident braking under pressure lap after lap.
FAQs
Do these include the aluminum hats?No. The D1-307 kit includes only the iron rotor rings and a new hardware kit. Your existing Girodisc hats are reused.
Are these compatible with factory rotors?No. Girodisc rings are engineered exclusively for use with Girodisc hats and cannot be mounted to OEM or other aftermarket assemblies.
Are the rotors directional?Yes. Each rotor features curved internal vanes that must be installed on the correct side for proper cooling and airflow direction.
What’s included?Two 348mm front rotor rings (left and right) and a full hardware kit with drive pins, bolts, and washers.
Ready to Upgrade?
When it’s time to refresh your braking system, the Girodisc D1-307 Front Replacement Rings deliver the unmatched cooling, strength, and consistency that define Girodisc. Perfect for both daily driving and track-day abuse, they’ll keep your Toyota GR Supra or BMW Z4 M40i stopping with confidence. Order your set today from Competition Motorsport and get back to peak performance.
GiroDisc Racing Brakes & Technologies
D1-308 Girodisc Mercedes 360mm Front Replacement Rings
$1,262.00
D1-308 Girodisc Mercedes 360mm Front Replacement Rings
These Girodisc D1-308 front replacement rings are sold in pairs and include new hardware. They are designed to bolt to existing Girodisc aluminum hats only (not compatible with OEM or other hats).
Vehicle Fitment
Mercedes-AMG GT (C190) 2017+ – Front (for Girodisc 360 mm kits)
Design & Performance
High-carbon iron rings with 48 curved internal vanes draw cooling air through the rotor. Floating two-piece construction reduces unsprung weight while reusable aluminum hats allow ring-only replacement.
Features
Replacement rings only; reuse your Girodisc hats
Includes new drive pins, spring clips, and Belleville washers
High-carbon iron rings with directional internal vanes
Slotted face for stable friction and pad cleanup
For Girodisc 360 mm front kits on the listed models
D1-308 Girodisc Mercedes 360mm Front Replacement Rings FAQs:
How do I know these rings match my hats? Verify your hat part number from the original Girodisc kit; D1‑308 mates to 360 mm front hats used in the listed AMG GT applications.
What is the minimum thickness? Replace when worn to Girodisc’s stated discard thickness or if cracks reach an edge (inspect regularly for track use).
Do I need threadlocker on the hardware? Use the supplied hardware and follow Girodisc torque/spec sheet; do not substitute fasteners.
Can I run these with drilled pads or track pads? Yes. Slotted rings are compatible with OEM and aggressive compounds; follow pad bedding procedures.
Related Products
A1-308 Girodisc Mercedes 360mm Front Rotors
A2-148 Girodisc Mercedes 360mm Rear Rotors
D1-308 Girodisc Mercedes 360mm Front Replacement Rings
D2-123 Girodisc Mercedes 360mm Rear Replacement Rings
GiroDisc Racing Brakes & Technologies
D1-308DS Girodisc Mercedes 360mm Front Replacement Rings (Dimpled & Slotted)
$1,405.00
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 Racing Brakes & Technologies
D1-310 Girodisc Mercedes A45, CLA45, GLA45 Front Replacement Rings
$1,118.00
D1-310 Girodisc Mercedes A45, CLA45, GLA45 Front Replacement Rings
D1-310 are front rings only, sold in pairs with fresh hardware. Reuse your existing Girodisc aluminum hats. Rings are engineered exclusively for Girodisc hats and are not compatible with OE or other aftermarket hats.
Vehicle Fitment
Mercedes-AMG A45 (W176) – Front (for A1-310 kits)
Mercedes-AMG CLA45 (C117) – Front (for A1-310 kits)
Mercedes-AMG GLA45 (X156) – Front (for A1-310 kits)
Service-Friendly Refresh
High-carbon iron rings with curved vanes maintain cooling performance. The included drive pins, clips, and Belleville washers restore proper float and clamp force.
Features
Replacement rings only; includes hardware
For use with Girodisc hats (A1-310 front rotor kits)
High-carbon iron, USA-poured and machined
Curved vane internal geometry for airflow
D1-310 FAQs
Minimum thickness or crack criteria? Replace if below Girodisc’s recommended service thickness or if a crack reaches the outer edge of the ring.
Bed-in required? Yes — follow a standard pad/rotor bedding procedure to stabilize the friction layer.
Hardware reuse? New hardware is included; do not reuse old pins/springs.
Torque spec? Follow Girodisc’s supplied instructions for fastener torque and sequence.
GiroDisc Racing Brakes & Technologies
D1-311 Girodisc Audi B9 S4, S5, SQ5 Front Replacement Rings
$1,262.00
D1-311 Girodisc Audi B9 S4, S5, SQ5 Front Replacement Rings
These D1-311 front replacement rings are sold in pairs with new hardware. Reuse your existing Girodisc aluminum hats. Rings are engineered exclusively for Girodisc hats and will not fit OE or other aftermarket hats.
Vehicle Fitment
Audi S4 (B9) – Front (for A1-311 kits)
Audi S5 (B9) – Front (for A1-311 kits)
Audi SQ5 (B9) – Front (for A1-311 kits)
Service-Friendly Refresh
High-carbon rings with curved vanes manage heat under repeated stops. New drive pins, clips, and Belleville washers restore the floating interface.
Features
Replacement rings only; includes hardware
For Girodisc A1-311 front rotor kits
High-carbon iron, machined in the USA
Curved vane geometry for airflow
D1-311 FAQs
When to replace? Replace at the recommended service thickness or if a crack reaches the outer edge.
Torque specs? Follow the included Girodisc instructions for torque and sequence.
Pad rebedding? Yes—rebed pads after ring replacement.
Related Products
A1-311 Girodisc Audi B9 S4, S5, SQ5 Front Rotors
A2-130 Girodisc Audi B8/B9 Rear Rotors
D2-130 Girodisc Audi 330mm Rear Replacement Rings
GiroDisc Racing Brakes & Technologies
D1-319 Girodisc Replacement Rotors
$1,147.00
Girodisc D1-319 Front Replacement Rotor Rings
Corvette C8 Z06 • For Girodisc 2-Piece Front Rotors (Non-Z07)
Refresh your braking performance with Girodisc D1-319 Front Replacement Rotor Rings for the 2023+ Chevrolet Corvette C8 Z06. Designed as direct replacements for your existing Girodisc two-piece front rotors, these rings restore consistent, track-ready stopping power.
Key Features
Direct-fit (Non-Z07): Replaces worn rotor rings on Girodisc two-piece front rotors for the C8 Z06.
Track-ready construction: Proprietary high-carbon cast iron for excellent thermal capacity and stability under extreme heat.
Floating mount design: Stainless hardware and alloy drive pins allow axial float to reduce stress, noise, and warping.
Efficient cooling: 72 curved vanes act as a centrifugal pump to move air and manage heat more effectively than solid rotors.
Hardware included: Ships with new bolts and mounting hardware for a straightforward install.
Perfect For
Track days and HPDE
High-performance street driving
C8 Z06 owners running Girodisc two-piece front rotors
Replacing worn rings without buying new rotor hats
What's Included
(2) Front Girodisc D1-319 rotor rings
All required mounting hardware
Fitment
2023+ Chevrolet Corvette C8 Z06 with Girodisc two-piece front rotors (non-Z07 brake package)
Not compatible with OEM one-piece or carbon-ceramic setups.
Why Girodisc
Girodisc manufactures premium motorsport and high-performance braking components in the USA. Whether you’re chasing lap times or driving spiritedly on the street, these rings deliver consistent, confidence-inspiring braking.
SKU: D1-319
GiroDisc Racing Brakes & Technologies
D1-320 Girodisc Corvette C8, Camaro 398mm Front Replacement Rings
$1,477.00
Girodisc Corvette C8, Camaro 398mm Front Replacement Rings
Refresh the braking performance of your Corvette C8 or Camaro with Girodisc 398mm Front Replacement Rings. Designed as direct replacements for existing Girodisc two-piece rotors, these rings let you reuse your aluminum hats, saving cost and maintaining the precision balance and performance your car was built for. Each pair comes complete with new hardware for a perfect fit.
Engineered for Track-Level Performance
Each Girodisc replacement ring is machined in the USA from high-quality, proprietary cast iron and features a race-proven curved vane design. This configuration draws cooling air through the rotor, enhancing thermal control and ensuring consistent braking during high-speed track sessions or spirited driving. The result is fade-free performance and long-term durability.
Features
Sold as a pair and includes new replacement hardware
Direct replacement for Girodisc two-piece front rotors
Reuse your existing Girodisc aluminum hats to save cost and time
Made from proprietary U.S.-poured cast iron for durability and heat management
Curved vane internal design promotes maximum airflow and cooling
Fully machined, balanced, and finished in the USA
Vehicle Fitment
2020–2025 Chevrolet Corvette C8 (all trims equipped with Girodisc 398mm front rotors)
2016–2024 Chevrolet Camaro SS, ZL1, and 1LE models with Girodisc 398mm front rotors
Corvette C8, Camaro 398mm Front Replacement Rings FAQs:
Do these fit OEM two-piece rotors? No. These rings are specifically designed for Girodisc two-piece rotor systems and will not fit OEM or other aftermarket hats.
What’s included in the kit? Two 398mm replacement rings, new hardware, and installation instructions. Your Girodisc aluminum hats are reused.
When should I replace my rings? Replace when minimum thickness is reached or if cracking, warping, or heat checking occurs.
Do I need to replace both sides at the same time? Yes. Always replace both front rings together for balanced braking and even wear.
Can I install these myself? Skilled DIYers can install them, but Girodisc recommends professional installation to ensure proper torque specs and safety.
Are these balanced? Yes. Each Girodisc ring is precision-balanced for smooth, vibration-free braking performance.
Please note: Girodisc replacement rings are designed exclusively for use with Girodisc hats unless otherwise specified.
GiroDisc Racing Brakes & Technologies
D1-327 Girodisc Hyundai N 360mm Front Replacement Rings
$1,047.00
Hyundai N 360mm Front Replacement Rings
Keep your Hyundai N’s braking system performing at its best with Girodisc 360mm Front Replacement Rings. Designed as direct replacements for existing Girodisc two-piece rotors, these rings let you reuse your aluminum hats to restore peak braking performance without the cost of a full rotor set. Each pair includes all new hardware and instructions for a quick, precise installation.
Race-Proven Design for Everyday and Track Use
Every Girodisc ring is made from proprietary cast iron poured and machined entirely in the USA. The curved vane internal structure is developed through racing to efficiently pump cooling air through the disc, minimizing fade and maximizing heat dissipation during hard braking. These rings maintain the same outstanding performance and reliability that make Girodisc the go-to upgrade for track enthusiasts.
Features
Sold as a pair and includes new replacement hardware
Direct replacement for Girodisc two-piece front rotors
Reuse existing Girodisc aluminum hats for cost-effective service
Made from proprietary U.S.-poured cast iron for superior heat management
Curved vane internal design promotes exceptional cooling
Precision machined and finished in the USA
Vehicle Fitment
2022–2025 Hyundai Elantra N
2022–2025 Hyundai Kona N
2019–2022 Hyundai Veloster N
Hyundai i30 N (international models)
Hyundai N 360mm Front Replacement Rings FAQs:
Do these rings fit OEM rotors? No. These rings are engineered exclusively for use with Girodisc hats and are not compatible with OEM or other aftermarket two-piece systems.
What’s included in the kit? Two 360mm replacement rings, new hardware, and installation instructions. Your existing Girodisc aluminum hats are reused.
When should I replace my Girodisc rings? Replace the rings when they reach minimum thickness or show cracking, warping, or visible heat checking during inspection.
Do I need to replace both sides at the same time? Yes, replacing both sides ensures balanced braking performance and consistent wear.
Can I install these myself? Experienced DIYers can handle the swap, but Girodisc recommends professional installation to ensure proper torque specs and safety.
Do I need new brake pads? While not required, it’s recommended to inspect your pads and consider replacing them with a compound suited for iron rotors to maintain optimal performance.
Please note: Girodisc replacement rings are designed to be used only with Girodisc hats unless specifically noted.
GiroDisc Racing Brakes & Technologies
D1-336 Girodisc Audi / Lamborghini Front Replacement Rings
$1,434.00
D1-336 Girodisc Audi / Lamborghini Front Replacement Rings
The Girodisc D1-336 Front Replacement Rings are designed for use with A1-336 Audi / Lamborghini Front Iron Conversion rotor kits. These replacement rings allow you to reuse the Girodisc aluminum hats, keeping long-term brake costs low without sacrificing performance.
Vehicle Fitment
Audi RS models equipped with 380 mm Girodisc A1-336 iron conversion kits
Lamborghini Huracán and similar platforms with Girodisc A1-336 front iron conversion
Rings only – designed exclusively for Girodisc hats
Serviceable Two-Piece Design
These replacement rings are machined from proprietary high-carbon iron and feature directional curved vanes to maximize airflow and cooling. Each pair includes new floating hardware for a complete service solution.
Features
Replacement rings only; reuse your Girodisc A1-336 aluminum hats
High-carbon iron construction with directional curved vanes
Includes new floating hardware
Direct fit for Girodisc A1-336 kits
Manufactured and machined in the USA
D1-336 Girodisc Audi / Lamborghini Front Replacement Rings FAQs:
Do these include hats? No, these are rings only. Reuse your existing A1-336 Girodisc aluminum hats.
Are these OEM compatible? No, they are designed only for Girodisc A1-336 rotor kits.
Do they come with hardware? Yes, new floating hardware is included with each set of rings.
When should I replace the rings? Replace at or below minimum thickness, or if cracks reach the outer edge during inspection.
GiroDisc Racing Brakes & Technologies
D1-357 Girodisc Nissan Skyline GT-R (R32 V-Spec, R33, R34) Front Replacement Rings
$932.00
Girodisc Nissan Skyline GT-R (R32 V-Spec, R33, R34) Front Replacement Rings
These replacement rings are designed for the Nissan Skyline GT-R R32 V-Spec, R33, and R34 front brakes. They are sold as rings only and are intended to be used with Girodisc aluminum hats. For correct fitment and performance, do not use with OEM or other aftermarket hats.
D1-357 Vehicle Fitment
• Nissan Skyline GT-R R32 V-Spec (Front – 324mm)• Nissan Skyline GT-R R33 (All models – Front)• Nissan Skyline GT-R R34 (All models – Front)
Track-Proven Materials, Serviceable Design
The rotor rings are machined from a proprietary high-carbon iron casting formulated to Girodisc’s specifications for durability and heat resistance. The 48 curved vanes act as a centrifugal pump, drawing cooling air through the hub to manage temperatures under hard use. The serviceable two-piece design lets you reuse your Girodisc hats and refresh braking performance by installing new rings (part number D1-357) when the originals wear out.
D1-357 Features
• Replacement rings only; reuse your existing Girodisc hats• Proprietary high-carbon iron for consistent performance• 48 curved vanes for efficient cooling under track conditions• Direct fit for Girodisc two-piece front rotors on R32 V-Spec, R33, R34 GT-R• Typical spec: 324mm diameter, 30mm nominal thickness• Recommended replacement thickness: 28mm
Girodisc Nissan Skyline GT-R (R32 V-Spec, R33, R34) Front Replacement Rings FAQs:
Do these include hats or hardware? These are rings only and are intended to be used with existing Girodisc hats. Hardware kits may be sold separately depending on your previous kit; contact us if you need hardware.
Can I use these with OEM Nissan or other aftermarket hats? No. These rings are engineered specifically for Girodisc hats to ensure proper fit and performance.
What is the recommended replacement thickness? Replace the rings at 28mm or if cracks propagate to the edge of the ring.
GiroDisc Racing Brakes & Technologies
D1-388 Girodisc Lotus Emira Front Replacement Rings
$1,262.00
Girodisc Replacement Rotor Rings for Lotus Emira / Evora 400–GT
When it’s time to refresh your braking system, the Girodisc D1-388 replacement rotor rings keep your setup performing like new. Designed to bolt directly onto your existing Girodisc A1-388 hats, these rings deliver the same high-carbon iron durability, cooling efficiency, and performance you expect from Girodisc, without the expense of replacing the entire assembly.
D1-388 Vehicle fitment
• 2022+ Lotus Emira (front axle)• 2017–2021 Lotus Evora 400 / 410 / 430 and 2020–2021 Evora GT (front axle)
Note: Fits Girodisc A1-388 hats only. These are rotor rings only, not a complete assembly.
High-carbon performance replacement rings
These rings are machined from Girodisc’s proprietary high-carbon iron formulation. The material composition maximizes durability and thermal stability under repeated heavy braking. With the 72 curved vane internal cooling system, the D1-388 rings continue to pull air through the hub to keep operating temperatures in check during intense track sessions.
D1-388 Features
• Direct replacement rings for Girodisc A1-388 assemblies• 370 mm diameter x 32 mm thickness• Proprietary high-carbon iron metallurgy• 72 curved vane internal cooling design• Designed and manufactured in-house in Bellingham, WA• Reuses your existing Girodisc aluminum hats and hardware• Recommended minimum thickness: 30 mm
Do these include hats or hardware? No. The D1-388 kit is rotor rings only. You’ll reuse your Girodisc A1-388 hats and hardware.
How do I know when it’s time to replace the rings? Girodisc recommends replacement at 30 mm thickness or when cracks extend to the edge of the ring.
Can I install these without special tools? Installation is straightforward but requires careful torqueing of fasteners. A professional shop is recommended if you’re not experienced with brake assembly.
Are these rings street-friendly? Yes. Like the original A1-388 rotors, these are designed to provide race-level performance while staying quiet and compliant for street driving.
Keep your braking performance sharp and cost-effective with Girodisc D1-388 replacement rotor rings for your Lotus Emira or Evora.
GiroDisc Racing Brakes & Technologies
D1‑288 GiroDisc VW/Audi 357 mm Front Replacement Rings
$1,047.00
VW, Audi 357mm Front Replacement Rings
Restore peak braking performance on your VW or Audi with Girodisc 357mm Front Replacement Rings. These direct-fit rings let you reuse your existing Girodisc aluminum hats, delivering like-new stopping power without the cost of a full rotor set. Each pair includes new hardware for a precise, hassle-free install.
Track-ready cooling, everyday reliability
Girodisc rings are machined in the USA from proprietary cast iron and feature a curved-vane internal design that actively pumps cooling air through the disc. The result is consistent pedal feel, excellent heat management, and confidence lap after lap.
Features
Sold as a pair; includes new replacement hardware
Direct replacement for existing Girodisc two-piece front rotors
Reuse your Girodisc aluminum hats to save time and cost
Proprietary U.S.-poured cast iron for durability and heat control
Curved-vane internal structure for efficient cooling
Precision machined and finished in the USA
Vehicle Fitment
2022–2025 Volkswagen Golf R (Mk8) — front axle with Girodisc two-piece rotors
2022–2025 Audi S3 (8Y) — front axle with Girodisc two-piece rotors
Verify your existing Girodisc hat part number and rotor size (357mm) before ordering
VW, Audi 357mm Front Replacement Rings FAQs:
Do these rings fit OEM or other brands’ two-piece rotors? No. These rings are engineered exclusively for use with Girodisc hats and are not compatible with OEM or other aftermarket two-piece systems.
What’s included in the kit? Two 357mm replacement rings, new hardware, and installation instructions. You’ll reuse your existing Girodisc aluminum hats.
When should I replace my rings? Replace when minimum thickness is reached or if you see heat checking, cracking, warping, or other signs of distress during inspection.
Do I need to replace both sides at once? Yes. Replacing rings in pairs ensures balanced braking performance and even wear.
Can I install these myself? Experienced DIYers can handle the swap, but professional installation is recommended to ensure correct torque specs and safety.
Do I need new brake pads? Not required, but inspect pad condition and consider a compound optimized for iron rotors for best bite and wear.
Please note: Unless specifically stated otherwise, Girodisc replacement rings are intended only for use with Girodisc hats.
GiroDisc Racing Brakes & Technologies
D2-007 Girodisc Subaru WRX STI (2004–2017) Rear Replacement Rings
$903.00
Girodisc Subaru WRX STI Rear Rings
Restore the braking precision of your Subaru WRX STI with Girodisc D2-007 316mm rear replacement rings. These precision-machined rings bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit. Replace only the wear surface to maintain peak braking performance and save on long-term maintenance costs while preserving your car’s factory brake bias.
Vehicle Fitment
Compatible with:• Subaru WRX STI (2004–2017, all trims)• Subaru Impreza WRX STI (GD, GR, GV, VA chassis)Note: For use with Girodisc 316mm two-piece rear rotor systems only. Not compatible with OEM one-piece or carbon-ceramic rotors.
Features
• Sold as a left/right pair with full floating hardware kit• Direct replacements for Girodisc 316mm two-piece rear rotors• CNC-machined from proprietary high-carbon cast iron• Directional curved vanes improve airflow and reduce fade• Maintains OEM brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 316mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and new hardware kit• Sold/priced per pair• MSRP: $630.00
Girodisc D2-007 Subaru WRX STI Rear Replacement Ring FAQs
Do these fit factory WRX rotors? No. These are designed exclusively for Girodisc two-piece rear rotor systems and will not fit OEM one-piece rotors.
Will they clear OEM Brembo calipers? Yes. They are built to factory dimensions and work perfectly with the stock STI Brembo rear calipers.
Are these recommended for track use? Absolutely. Girodisc’s floating design and high-carbon alloy manage heat efficiently, preventing warping and fade during extended track sessions.
How often should I replace the rings? Replace when the rotor reaches minimum thickness or shows visible cracking or heat checking from repeated heat cycles.
Upgrade your Subaru WRX STI with Girodisc D2-007 316mm rear replacement rings — engineered for lightweight performance, superior cooling, and consistent braking response from canyon runs to track days.
GiroDisc Racing Brakes & Technologies
D2-008 Girodisc Mitsubishi Evo VI–IX Rear Replacement Rings
$903.00
Girodisc Mitsubishi Evo 6–9 Rear Rings
Bring your Mitsubishi Evolution’s braking system back to life with Girodisc D2-008 300mm rear replacement rings. These precision-engineered rings are designed as direct replacements for Girodisc two-piece rotors, allowing you to replace only the wear surface while reusing your existing Girodisc aluminum hats. Perfect for high-performance street and track builds, they deliver consistent braking force and superior cooling compared to factory rotors.
Vehicle Fitment
Compatible with:• Mitsubishi Lancer Evolution VI (1999–2001, rear)• Mitsubishi Lancer Evolution VII (2001–2003, rear)• Mitsubishi Lancer Evolution VIII (2003–2005, rear)• Mitsubishi Lancer Evolution IX (2006–2007, rear)Note: Designed exclusively for Girodisc 300mm two-piece rear rotor systems. Not compatible with OEM one-piece rotors or carbon-ceramic brake setups.
Features
• Sold as a left/right pair and includes full floating hardware kit• Direct replacements for Girodisc 300mm two-piece rear rotors• CNC-machined from proprietary high-carbon cast iron• Directional curved vanes improve cooling and fade resistance• Maintains OEM brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 300mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and new hardware kit• Sold/priced per pair
Girodisc D2-008 Mitsubishi Evo 6–9 Rear Ring FAQs
Are these compatible with factory Brembo calipers? Yes. The D2-008 rings retain OEM fitment and clearances for Evo VI–IX models with Brembo brake systems.
Can I mix these with stock front rotors? It’s possible, but for optimal balance and cooling, Girodisc recommends upgrading all four corners for matched heat capacity and bias.
How do these compare to OEM Evo rotors? Girodisc rotors are lighter, run cooler, and offer greater resistance to cracking or warping under repeated track use.
What maintenance do they require? Inspect after every track event; replace rings when they reach minimum thickness or show excessive heat checking.
Upgrade your Mitsubishi Evo’s braking performance with Girodisc D2-008 300mm rear replacement rings — engineered for durability, cooling, and consistent pedal feel on both road and track.
