Club Benefits

Schroth Profi 2x2 Porsche GT2/GT3/GT4 Racing Harness Porsche GT3 Cup Cars come with Schroth belts direct from the factory. If you're putting harnesses in your Porsche GT3, GT3RS, or GT4 with the Lightweight Bucket (LWB) seat setup, you'll want these belts! The Flexi 2x2 GT3 features 2” shoulder belts ideal for Frontal Head Restraint (FHR or HANS) devices. It has 2" pull-down Profi lap belts with sewn-in anchors specifically made for Porsche's carbon fiber Lightweight Bucket ("LWB") seats. A T-bar adjustable sub-strap is standard, and shoulder- and sub-strap attachment hardware is wrapped in. The FHR/HANS specific shoulder belts are designed to make the driver safer and more comfortable. The full 2" shoulder webbing fits perfectly on a FHR or HANS device, creating optimal force distribution on the surface of the device. The main impetus behind the 2" lap belt is added safety. A 2" belt rides within the crest of the human pelvis, where a 3" belt would rest on the edges. This allows you to get the belt up to an inch-and-a-half tighter, so the lap belt will work earlier in an accident because it gets loaded faster. It's also more comfortable and easier to adjust as there's less friction through the adjuster. Comes with Porsche-specific attachments for the lap belts and snap-in attachments at sub-strap points. The shoulders come ready to be wrapped around a roll bar or roll cage. Bolt-in attachments can be purchased separately for shoulder- and sub-straps. Available in Black or Red. (Blue or Yellow are available by special order.) Note: If you drive a GT3 Cup car or are driving a Porsche with a fixed-back racing seat, a standard non-Porsche harness such as the Enduro 2x2 or Flexi 2x2 would be better suited for your vehicle. See Schroth's Harness Installation documentation here. Schroth Flexi 2x2 Porsche Harness Details Manufacturer: Schroth Manufacturer part no.: SR 94700US FHR/HANS specific 2” shoulder belts 2” Flexi pull-down lap belts with sewn-in Porsche hardware T-bar adjustable sub-strap Rotary cam lock FIA 8853-2016 homologation

Sparco Dry-Tech Helmet Bag with Dryer The Sparco Dry-Tech Helmet & HANS Bag w/ Dryer is designed to keep your helmet dry and protected1. The Dry-Tech is a unique built-in drying system with a 12V fan and ventilation holes. The 12V fan is powered by a USB cord, so any powered USB adapter up to 12V will work (e.g., a phone or tablet chargers). The Sparco Dry-Tech Helmet Bag is constructed from 600D polyester with neoprene and synthetic leather inserts. It can even accommodate a helmet with a HANS device still attached. For transport convenience, the Sparco Dry-Tech Helmet Bag features two carrying handles and a shoulder strap. Sparco Dry-Tech Helmet Bag with Dryer Details Manufacturer: Sparco Manufacturer part no.: 016441NRSI Built-in drying system (USB 12V power) with cover Ventilation holes for passive drying/breathability HANS device compatible Zippered expansion for increased capacity Two carry handles and shoulder strap 1 Note: helmet and HANS device (shown) are sold separately.

Sparco 600 Series Seat Mounting Base Fitment for a Wide Range of Cars and Trucks Sparco 600 Series seat bases utilize the factory seat mounts on your car's or truck's floor to give you a strong, flat mounting surface for your Sparco racing seat. Sparco 600 Series seat bases are vehicle specific for an easy, bolt-in installation. The 600 Series Sparco racing seat base is constructed with 3/16" steel providing a strong, flex-free mount. Sparco 600 Series racing seat mounting bases are powder coated in a black wrinkle finish for a clean look. In addition to the mounting holes provided for standard bolt-on installation, the Sparco base has a wide metal platform for custom installation of side mounts directly to the base (drilling required). Direct installation is handy in race vehicles where the lowest seat position is desired. Note: We carry Sparco 600 Series seat mounting bases for dozens of popular fitments in stock. For less-common fitments, it may take up to 10 business days for your mounting base to ship. Photos are of various Sparco 600 Series Mounting Bases. Your seat mounting base may differ. Sparco Seat Mounting 600 Series Base Details: Manufacturer: Sparco Manufacturer part no.: 600SB Construction: 3/16" steel Finish: wrinkle-finish black powder coating Outer mounting holes for wide side-mount racing seats Mounting surface allows direct installation of side mounts (some drilling may be required) Proper Installation of Your Sparco Racing Seat Requires: (1) Sparco 600 Series Seat Mounting Base (1) Set of two side mount brackets (steel or aluminum) (1) Side mounting hardware kit (50002) Optional (1) Track Set Seat Slider (00493)1 1 The Track Set Seat Slider allows for forward and aft seat adjustment. It is not SFI or FIA certified. Check with your sanctioning body before installing. Sparco 600 Series Seat Mounting Base Part Numbers Copy the SKU from the chart below and paste it into the "Input Part Number" field above when adding to cart.

Sparco Shield RW-9 Nomex Balaclava   The Shield RW-9 line of Nomex underwear provides the highest level of breathability, comfort and protection. When designing this line, Sparco studied the driver's sitting position to ensure ultimate fit and comfort. Shield RW-9 uses a seamless construction with ultra-soft stretchable material. There are two different woven materials in key areas; thin stretch Nomex for comfort and mobility as well as a double perforated Nomex for increased breathability and ultimate comfort. The minimal seams are stitched flat with thin specialized thread for added comfort. All Shield RW-9 pieces are treated with Sparco X-Cool Silver which draws heat from the body surface to cool the driver. In addition to cooling the driver, X-Cool Silver treatment has an anti-bacterial effect. The Shield RW-9 collection has pieces to fit every driver's style, including short-sleeved nomex t-shirts, long-sleeved nomex shirts, nomex pants, nomex balaclava, and nomex socks. SPARCO RW-9 NOMEX BALACALVA FEATURES The Shield RW-9 line is SFI 3.3 rated  Seamless stretchable Nomex in key areas for mobility Perforated knit in key areas for breathability Designed for comfort in a driving position Minimal external seams increase driver comfort X-Cool Silver draws heat from the skin to cool the driver X-Cool Silver has anti-bacterial effect Available in white or black

Sparco Pit Stop Crew Shoes The Sparco Pit Stop shoe was designed specifically for pit crew use but it can also be used for racing where a durable and thicker sole is preferred such as off-road. The Pit Stop shoe is SFI approved for racing or “over the wall” crew use. The Pit Stop has a suede upper with a perforated tongue and heel for added breathability and it has leather panels on the toe box and heel for extra durability. The anti-static, fuel- and oil-resistant rubber sole was designed for maximum grip, with a toe cap designed to protect the toe area when in the kneeling position. Internal lace system to help protect from snagging. The Pit Stop has an extra padded collar area with a Velcro closure which gives extra support. The internal foot bed has a special cushioned insole that gives maximum comfort. The Sparco Pit Stop shoe is available in black in US sizes 7-1/2 to 15. Sparco Pit Stop Shoe Technology Padded collar and adjustable strap Pre-shaped anatomic insole Perforated breathable upper Anti-static, fuel- and oil-resistant sole Internal lacing system SFI 3.3/5 approved

Sparco Track Set Seat Slider The Sparco Track Set, more commonly known as seat sliders, are recommended for any seat application1. This seat track set allows you to adjust your seat position fore and aft for a customized, comfortable cockpit. Sparco seat tracks employ a double locking mechanism for increased safety. 1 Note: seat sliders not intended for racing or competition use. Sparco Track Set Seat Slider Details Manufacturer: Sparco Manufacturer part no.: 00493 Double locking mechanism for increased safety Seat tracks are not intended for race applications

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:

CMS Performance Bolt-In Roll Bar for Porsche 911 (991 Gen) This Roll Bar Fits The Following Cars: 991.1 Porsche GT3 (2014-2016) 991.2 Porsche GT3 (2018-2019) 991.1 Porsche GT3RS (2015-2016) 991.2 Porsche GT3RS (2018-2019) 991.2 Porsche GT2RS (2018-2019) 991 (all) Porsche Carrera/Turbo w/ factory sunroof (2012-2019)1 The Best Roll Bar For The Iconic Porsche 991 The CMS Performance Porsche 991 Roll Bar is the strongest, safest, and highest quality bolt-in roll bar on the market for your 991 Carrera, GT2RS, GT3 or GT3RS, period. In designing and building the CMS Performance Roll Bar, safety and structural rigidity are our primary goals. That's why we fully TIG welded 1.75" Docol R8 Advanced High-Strength Steel tubing instead of the less-expensive but inferior 4130 CrMo others use. It's why we use the strongest chassis mounting points and cross-brace the main hoop. Precision And Innovation Set CMS Performance Apart Click Here for Installation Instructions The CMS Performance Roll Bar for the Porsche 991 is designed to locate your racing harness shoulder straps at precisely the right angle (0° to -20° front-to-back) and distance (as close as possible, not more than eight inches) to the driver and passenger, regardless of your seat position. Our use of high-tech Docol R8 tubing and main-hoop cross bracing gives you an unobstructed rear view without the need for more extensive braces that roll bars made of Chromoly or mild steel have to use. CMS Performance designed the rear kickers of the Porsche 991 Roll Bar to bolt to the rear shock towers (same as the factory GT3 Cup roll cage). Using the strongest mounting points adds rigidity to the chassis and suspension to improve handling precision. The CMS Performance main roll hoop is mounted to the steel sub-structure beneath the vehicle just like the factory cage. Built Like A Tank, Finished Like A Porsche The CMS Performance Roll Bar for the Porsche 991 is fully TIG welded by master welders giving it unsurpassed structural integrity and a precision fit in the car. CMS Performance powder coats each roll bar in-house to ensure a premium finish. This allows us to offer a full range of powder coats color-matched to your Porsche's OEM color palette2. You can also get your roll bar powder coated in one of our custom technical finishes like the amazing Superchrome! Or, you can choose a rich satin black if stealth is more your thing. Every finish option is included in the price of the CMS Performance Roll Bar. Don't Settle For Anything Less Than The Best From CMS Superior engineering and design, premium materials, expert construction, and a beautiful custom finish at an affordable price. That's what sets CMS Performance apart from any other manufacturer. All backed by our legendary customer service, it adds up to this: you can certainly pay a lot more for a roll bar, but you can only get the best from CMS. Add Premium Harnesses to Complete Your Safety Upgrade Using the drop-downs above, you can add six-point Schroth Enduro 2x2 GT3, Schroth Flexi 2x2 GT3, or Sabelt Silver Series GT3 harnesses to your order for a truly comprehensive safety upgrade. Or add specially-engineered Schroth Profi II ASM GT3 or Sabelt Porsche GT3 four-point harnesses to your order for a simpler installation. Both six- and four-point harnesses are specially designed to bolt directly to your Porsche lightweight carbon bucket seats. (Some passenger seats do not have a factory sub-strap pass through.) When installing six-point harnesses in your Porsche, we strongly recommend adding the CMS Performance Sub Strap Mount to each seat. Custom designed to fit the Porsche lightweight carbon bucket seats, they provide solid, properly located anchors for your anti-submarine straps and are very easy to install alongside your CMS Performance roll bar. CMS Performance Porsche 991 Roll Bar Details Manufacturer: CMS Performance Manufacturer Part: CPRB-991 Material: Docol R8 Advanced High-Strength Steel, 1.75" O.D. Construction: Full-penetration 360o TIG welding, one-piece main hoop and three-piece kickers, CNC-cut precision mounting plates, CNC-machined steel interlocking clamps ease installation American-made Grade 8 hardware included Full seat travel with any seat Detailed installation instructions & all necessary hardware for a seamless installation 1 Be sure to select "Yes" under the Sunroof Version option above when ordering a roll bar for your 991 equipped with the factory sunroof. This version is slightly shorter than the non-sun roof roll bar. 2 Note: powder coat colors are professionally matched to be as close as possible to factory paint codes. However, color-matching powder is not the same as mixing liquid paint. In a few cases, slight color variance is normal and is not perceptible with the roll bar installed inside the car. This product is intended for off-road race track use only.

AiM Sports Solo2 DL Data Logging Lap Timer The Premier Data-Logging & GPS Lap Timer For Motorsports Enthusiasts The AiM Solo2 DL receives data from two satellite constellations, GPS and Glonass; this is a huge step forward since it is unbelievably faster and more precise than the previous version. Power-on requires only a few seconds and lap times are calculated within a 0.02-second tolerance thanks to 10Hz (ten times per second) GPS sampling. A sleek, newly-designed case with easier-to-use metal buttons add a premium look and feel to the world's most popular data-logger and GPS lap timer. The screen can be back-lighted in one of seven colors! The AiM Solo2 DL With An ECU Connection Solo2 DL -- the Solo with an ECU connection -- has over a thousand ECU protocols in its database. Easily connect your Solo2 DL to your ECU and get reams information with just one cable. In case your ECU protocol isn't in the database, no problem: an ECU Driver Builder is available in the included Race Studio 3 software, allowing you to create your protocol yourself. This gives you access to a huge amount of data from your car that can be overlaid with GPS data to create an incredibly powerful analysis and learning tool! Choose your ECU Cable: OBD2: the standard vehicle diagnostic port beneath your dash supplies the Solo2 DL with a wealth of information. This is the standard cable most people will use. CAN/RS232: the Solo2 DL can be connected to your CAN Bus for an even richer, broader spectrum of information than OBD2. This cable can require a bit more know-how to connect, however. Coil RPM: the Solo2 DL now features a digital input allowing to log RPM either from square wave signals (8-50 V each signal) or pulse signals (150-450 V ignition coil trigger – primary circuit).  Find Your Race Track Quickly and Easily Solo2 DL has access to a database of more than 3,000 tracks all over the world! As soon as it switches on, the Solo2 DL identifies its position, recognizes the starting line coordinates of the track, and is ready to start sampling lap times. If your track isn't in the database, no problem: the Solo2 DL will automatically enter into autolearning mode, figures out the characteristics of the track, and starts lap-timing anyway. Predictive Lap Time LEDs The new Solo2 DL's predictive lap time engine is now even more reliable. And with configurable RGB LEDs, it will give you a clear, fast indication of how your current lap compares with your best possible lap. That's functionality you typically find only on expensive driver-coaching electronic aids; now it's at your fingertips with the Solo2 DL! Race Mode Selection The AiM Solo2 DL can manage different types of races, such as the following: Speed races in a closed circuit Point to-point races Regularity Performance tests (0-100 km/h etc.) In each of these configurations, the Solo2 DL gives the relevant information during the race/test along with powerful data review immediately after each session. WiFi & iPhone Connectivity WiFi communication with your laptop is easy, fast, and with no connectors or cables. It's the best way to configure your Solo2 DL, manage the track database, and download lap data to your PC. Connect your Solo2 DL to your iPhone for quick and easy data analysis, managing your track database, etc. Post-Race Data Analysis With RaceStudio 3 After downloading on-track data gathered by the AiM Solo2 DL to your laptop, you can easily analyze that data in AiM's amazing RaceStudio 3 software. Compare laps, lines, driver and car performance parameters, and much more to learn where you can trim tenths and outrun your competition! AiM SmartyCam Data Integration AiM gives your SmartyCam the perfect connection: the Solo2 DL takes data from your ECU, merges it with GPS lap information, and transmits everything seamlessly to your AiM SmartyCam. The resulting video includes your ECU and lap data in a graphical overlay! Feel free to give us a call at (844) 438-7244 to discuss the cool new features and capabilities of AiM's latest, greatest compact data-logger/lap timer today!

OMP ONE Nomex Balaclava FIA 8856-2018 HOMOLOGATED The Top level balaclava made with comfortable fire retardant seamless fabric that ensures the best comfort. Two later seams on top for the best fitting. Two sizes available.OMP One Series of fire-retardant underwear is designed to work together with OMP's Dry System fire suits (the ONE and Tecnica Evo lines) to allow for maximum cooling regardless of the heat. The ONE Nomex balaclava's slim-cut design allows for a smooth, comfortable fit under your helmet, improving moisture wicking to keep your head cool and dry. his open face balaclava features ultra-flat seams for ultimate comfort even on long stints. Made from soft-knitted advanced technology fabric for high breathability and an anatomic shape for an excellent fit. Available in both regular and small sizes (perfect for kids). OMP ONE EVO BALACLAVA FEATURES FIA 8856-2018 Homologation Open face ultra-light balaclava Anatomic shape for increased comfort Ultra-flat, anti-rubbing seams mean fewer pressure points inside your helmet OMP Dry System 3D breathable material in the face for a real cooling effect

Alpinestars Tech-1 K v2 Karting Shoes The Alpinestars Tech-1 K v2 karting shoe was developed to withstand the stresses of kart racing, with a nubuck and microfiber upper for durability and support. The new anatomical design improves forefoot profiling, while an asymmetric lacing system offers a more progressive closure. New external reinforcements on the heel and toe area and an ultra-thin Formula 1 spec sole with rounded heel give you unsurpassed levels of grip and sensitivity on the pedals. Tech-1 K v2 Shoes Key Features Innovative Alpinestars foot counter for maximum performance: an ergonomic, polypropylene heel counter provides support and stability inside the shoe, while a flatter forefoot with die-cut ribbing provides greater feel on the pedals. Ultra-thin Formula 1 specification sole uses Alpinestars exclusive rubber compound which is strategically ribbed to provide pedal sensitivity and grip - in both wet and dry conditions. Construction Designed and developed specifically for the stresses of kart racing. Advanced hybrid construction consisting of a durable nubuck microfiber upper with strategically positioned perforated zones for lightweight performance, excellent breathability and superior feel. External toe reinforcements on both sides for additional abrasion resistance and protection. Enhanced anatomical profiling for improved levels of comfort, fit and performance. Dual asymmetric closure system incorporates adjustable ultra-thin hook-and-loop grip strap plus aramidic speed top lacing coupled with para-aramidic eyelets for durability, personalized fit and secure closure. Collar padding constructed from Nitrile rubber for comfort and weight-saving. Soft microfiber collar is cut lower at the rear to allow greater Achilles’ heel comfort and improved range of movement. Tongue features perforated soft padding for comfort and improved fit. External rear heel rubber for improved abrasion resistance and protection.

Racetech Door Pulls When it’s you versus the race track, every piece of your gear has to deliver in terms of performance, reliability, and light weight. Racetech fabric racing door pulls are light, reliable, and built for abuse so you can rely on them when the stakes are highest. Key Features: Precision Engineering: Designed with the racer’s mindset for maximum performance and safety. Lightweight Strength: Every gram saved matters when you’re chasing lap times and podiums. Built for Competition: Meets the standards serious racers demand on and off the track. Specifications: High-performance nylon webbing Track-tested durability Optimized for professional motorsports Racetech Door Pulls FAQs: Is this product certified for racing use?Yes, it meets all relevant racing standards for its category. Can it be used for street or track only?This product is specifically optimized for track and race environments. How does it compare to similar products?Designed for maximum performance, it offers superior durability and functionality over typical alternatives. Why Buy from Competition Motorsport? We live racing. That means offering only track-proven gear, expert advice, and fast shipping so you’re never left waiting in the paddock. Let’s get you dialed in for success.

Sabelt Racing Tow Straps Performance That Keeps You in the Race Sabelt's Racing Tow Strap is simple and straightforward to install, available in multiple colors to complement any vehicle, and makes sure you can always get pulled out of trouble if/when the time comes! Key Features: Precision Engineering: Designed with the racer’s mindset for maximum performance and safety. Lightweight Strength: Every gram saved matters when you’re chasing lap times and podiums. Built for Competition: Meets the standards serious racers demand on and off the track. Specifications: Length: 10 7/8 in. (276 mm) Mounting hole: 15 mm diameter High-performance materials Track-tested durability Optimized for professional motorsports Sabelt Racing Tow Strap FAQs: Is this product certified for racing use?Yes, it meets all relevant racing standards for its category. Can it be used for street or track only?This product is specifically optimized for track and race environments. How does it compare to similar products?Designed for maximum performance, it offers superior durability and functionality over typical alternatives. Why Buy From Competition Motorsport? We live racing. That means offering only track-proven gear, expert advice, and fast shipping so you’re never left waiting in the paddock. Let’s get you dialed in for success.

Bell SRV-8 Replacement Helmet Shields Functional and Beautiful Tinted, Mirrored, or Amber Hi-Def The Bell SRV-8 is a 3mm injection-molded, optically correct polycarbonate face shield. The SRV-8 3mm shield uses the SRV-1 pivot kit (not included), is compatible with tear offs, and comes in a variety of tint colors and mirror finishes. You can order your SRV-8 shield with a Double Screen Anti Fog (DSAF) insert  to greatly improve fog control. Bell recommends that you periodically change shields for better vision and safety. All shields come with adjustable tear-off posts (tear-offs sold separately). Bell SRV-8 Helmet Shield Tints and Finishes Blue Mirror Silver Mirror Gold Mirror Light Smoke Dark Smoke Amber Hi-Def Clear Bell SRV-8 Shields Fit the Following Helmets Bell Racing M.8 Bell Racing M.8 Carbon Bell Racing BR8 Bell Racing BR8 Carbon

Sparco Racing Tow Strap When the unexpected happens, your Sparco tow strap gets you back in the game without skipping a beat. Performance That Moves You Forward Key Features: Precision Engineering: Designed with the racer’s mindset for maximum performance and safety. Lightweight Strength: Every gram saved matters when you’re chasing lap times and podiums. Built for Competition: Meets the standards serious racers demand on and off the track. Specifications: High-performance materials Track-tested durability Optimized for professional motorsports FAQs: Is this product certified for racing use?Yes, it meets all relevant racing standards for its category. Can it be used for street or track only?This product is specifically optimized for track and race environments. How does it compare to similar products?Designed for maximum performance, it offers superior durability and functionality over typical alternatives. Why Buy from Competition Motorsport? We live racing. That means offering only track-proven gear, expert advice, and fast shipping so you’re never left waiting in the paddock. Let’s get you dialed in for success.

Stilo Helmet Non-Adjustable Top Air Systems (Round or Aluminum Oval Intake) - Fits ST5 & ST6 Keep Your Stilo ST5 & ST6 Helmet Ventilated With The Stilo Top Air Kit Fresh air keeps you cool and keeps sweat from getting in your eyes as you take the checkered flag. Endurance racers keep their focus high and lap times low by staying in the cool zone. This unique cooling system feeds air from your car’s fresh air system to both the top of your head and to the front of your face, while at the same time helping keep the inside of your visor clear. This system integrates into the existing design of the ST5 & ST6 helmet and does not require any drilling of the shell or modifications to the internal EPS foam. There are four small ventilation holes molded into the top of every ST5 helmet. Stilo's Top Air system fits over the forward two holes and extends down the front of the helmet and just under the top of the visor. Air fed into the Top Air is directed both to the top of the head and down over the face. A small deflector just inside the visor area directs air towards the visor and away from the eyes. Old air flows out of the rear holes on the top of the helmet and from the bottom of the helmet, significantly reducing CO2 buildup in the helmet. This Stilo Top Air System can be fitted to all Stilo ST5 & ST6 model helmets. It comes in two sizes to best fit your helmet: YA0834 Non-Adjustable oval for helmets XS (54cm) to L (59cm) YA0857 Non-Adjustable oval for helmets L+ (60cm) to XXXXL (64cm) YA0853 Non-Adjustable round for helmets XS (54cm) to L (59cm) YA0859 Non-Adjustable round for helmets L+ (60cm) to XXXXL (64cm)