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The Stilo ST5 FN ABP 8860-2018 Advanced Ballistic Protection The Stilo Helmets ST5 FN ABP 8860-2018 carbon fiber helmet was designed for professional racers needing to satisfy the latest FIA 8860-2018 regulation. It’s also the helmet of choice for drivers who won’t compromise their safety, no matter where they’re racing. This certification provides an unparalleled level of puncture protection as well as impact resistance. ABP is an acronym for "Advanced Ballistic Protection". The ABP replaces the zylon panel required by FIA in the previous generation (FIA 8860-2010) helmets, integrating stronger protection into the front of the helmet shell. A brand new testing procedure was introduced to evaluate this area, based on military ballistic specifications with a projectile shot at 250 km/h. The Stilo ST5 FN ABP was the first helmet to be certified to this new standard, offering a higher safety degree while maintaining dimensions and weight. The Stilo ST5 FN ABP 8860-2018 is among the lightest carbon fiber racing helmets on the market. While it lacks the side ports of the Stilo ST5 GT 8860-2018 Carbon Fiber Helmet, it can still be outfitted with electronics, top forced air and a helmet eject system. Thanks to an innovative design incorporating mounting and routing for these options, integration is sleek and seamless with nothing protruding, hanging down, or otherwise getting in the way. When not in use, you don't even know they're there. Looking for increased visibility? The Stilo ST5 FN ABP 8860-2018 has a taller and lower-placed eyeport, giving you better visibility while not compromising your safety. Every Stilo visor has a center pinch-clip to make opening and closing easy, even while wearing nomex racing gloves. Stilo Helmets ST5 FN ABP 8860-2018 Sizing: Small shell | XS 54, S 55, M 57, L 59 Large shell | L 60, XL 61, XXL 63, XXXL 64 We have found that customers who typically wear a size 59 in other helmet brands are more comfortable in a Stilo size 60, which uses the large shell. Please order accordingly. Stilo Helmets ST5 FN ABP 8860-2018 Details: FIA 8860-2018 certification Includes Stilo HANS posts Stilo Owner's Kit sold separately. Significantly lighter than previous Stilo helmets Sizing from XS through 3XL Stilo ST5 shields are interchangeable across all ST5 helmets Eight top ventilation holes (can be used with the Stilo ST5 Helmet Top Air System sold separately.) Re-designed cheek pads are more contoured and comfortable than previous Stilo helmets Made from 100% medium-tensile carbon Weight (+/-30 g): Small shell 1200g (2.6 lbs) Large shell 1320g (2.9 lbs) Optional Replacement Stilo ST5 FIA8860-2018ABP Visors If you want the absolute lightest FIA 8860-2018 ABP helmet on the market, check out the amazing Stilo Helmets ST5 FN ABP ZERO 8860-2018 Carbon Helmet. Measuring Your Head: The most effective helmet is one that fits properly. To measure your head, have an assistant use a dressmaker's tape or a piece of string to measure the circumference of your head. Start at a point about an inch above your eyebrows, looping around the back of your head at the point that results in the largest measurement, and finally then around to the front again. It's a good idea to take two or three measurements to make sure you have the largest one. This helmet will ship with signature required for delivery.

OMP One Evo X Driver Race Suit Constructed from the latest generation of fire retardant fabrics, the OMP One Evo X racing suit is lighter than previous-generation OMP One suits while offering greater protection with the latest FIA homologation. The two-layer One Evo X features an ultra-light and soft inner lining, paired with highly breathable inserts for maximum breathability. It also features OMP's exclusive Stretch-Dry System, a new fabric combination that combines OMP's Dry System technology with a new elastic 3D material to further enhance driver mobility and performance. OMP One Evo X Driver Race Suit Details FIA 8856-2018 homologated Two-layer Nomex (fire resistant) fabric Fabric Weight: 235 grams/m2 Semi-floating shoulder, legs and inner collar inserts using soft knitted elastic fabric. Stretch Dry System fabric on limbs, inner-thigh, chest, elbows and knees are breathable and elastic. Highly breathable Dry System 3D material on back, hips, calves and under the sleeves. Regular fit, with ultra-flat, anti-rubbing seams, and soft knitted interior. Hidden outer pockets. Size Chart

For drivers who demand the utmost from their car Designed and tested specifically for track day enthusiasts and for drivers who demand the utmost performance from their cars, these kits offer superlative performance for both normal driving and demanding track day sessions. Brembo kits consist of cross-drilled or slotted ventilated, one-piece or composite discs and aluminium calipers with 4, 6 or 8 pistons; a complete set of high performance pads; metal-braided hoses and high quality hardware. ​Solutions and technologies born on the race trackBraking systems consisting of motorsports-derived components offering levels of technology and performance without par on the market today and embodying the purest expression of Brembo's state-of-the-art technology.The kit consists of aluminium calipers with opposed pistons which, depending on the car model and in increasing order of performance, may be composite, monoblock or even billet monoblock components, combined with cross-drilled or slotted one-piece or composite oversized discs.Brembo kits combine the best solutions available to offer the perfect solution for the individual characteristics of each model.The heart of the kit consists of aluminium calipers. These are also available as monoblock parts machined from a single billet of cast aluminium, which ensure outstanding rigidity and minimised deformation. The discs supplied in the kit, which may either be floating or one-piece, depending on the specific car model, feature an exclusive venting system that improves cooling capacity and increases resistance to cracking caused by thermal shock by over 40%.Cross-drilled and slotted finishes are designed and executed with meticulous precision. These holes or slots in the braking surface help dissipate heat and eliminate brake dust and gases. A set of high-performance brake pads with specific friction materials for each application, TÜV/DOT homologated metal-braided hoses, an adapter and high-quality fastener hardware complete the kit. More braking torque and thermal capacity on the trackUsing radial-mounted fixed calipers together with oversized discs gives the system greater braking torque and superior thermal capacity. The result is a braking action that is noticeably more immediate and decisive even in normal road usage, and is extraordinarily powerful and consistent under the repeated loads of track use. Fixed calipers improve the durability and efficiency of the system: the opposed multiple pistons act on the pads with more precision, due to the smaller piston diameter and the reduced pressure exerted on each individual piston, while the greater overall surface area between the pads and pistons results in more uniform friction surface wear. The superlative stiffness of the calipers and the metal braided hoses reduce brake fluid absorption. The result is improved, more stable brake pedal pressure, making it possible to modulate braking force more precisely and enhancing pedal feel. Featuring a hat in aluminium alloy, the oversized floating disc system reduces unsprung mass (for improved handling) and thermal stress. The mounting system is engineered to permit a greater degree of both radial and axial float. This characteristic, together with the greater dimensions of the braking rotor surface, improves the dispersion of the heat generated by the repeated, intense thermal stress that the discs are subjected to, for consistent braking performance and pedal feel even after numerous laps on the track. Eye-catching, unique looks With a combination of painted calipers (available in red, black or silver) flaunting the Brembo logo, and slotted or cross-drilled discs, the Gran Turismo kit gives an unmistakably sporty, eye-catching look to the car, offering that extra special touch for drivers who want their vehicle to stand out from the crowd.Catering for the more discerning driver is the GT-R line of kits. These offer even more performance and consist of billet-monoblock calipers, slotted discs in diameters up to 405 mm and special high performance pads.

Thunderhill is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline. Fits Lamborghini Aventador The GiroDisc system is a direct replacement for the OEM brake disc. The 2-piece floating disc will bolt directly to the car and work with OEM calipers perfectly. By upgrading your brakes with these lightweight high-performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. The Giro Disc rotors are lighter than OEM pieces. The reduction in rotational and unsprung weight allows for quicker acceleration and suspension response. When used with Pagid or PFC performance brake pads, and Thunderhill RF-1 brake fluid (also available from CompetitionMotorsport.com), you have an amazing solution to overheating, cracking and warping rotors. The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. The disc is manufactured from cast iron which is constructed in the USA and is made to the same specification with the same material used by professional racing organizations. The rotors curved vane design was developed in racing and acts as a centrifugal pump to force cooling air through the disc. The rotor and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by GiroDisc in the USA to our own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. The 2-piece GiroDisc design allows for rotor only replacement as well to minimize future replacement costs and deliver outstanding performance and cooling. Sold/Priced per pair.

Thunderhill is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline. Fits Ferrari 599 GTB with Optional CCM Rotors The Girodisc system is a direct replacement for the OE disc however a different brake pad with an annulus (pad swept area) of 66mm or less must be used. This is done to keep the rotor weight at a reasonable level. If we manufactured a rotor with the same annulus as the OEM CCM rotors they would be far too heavy.The necessary pad shape is available from both Pagid and PFC. If there is a specific pad compound you're after please contact us directly to provide the correct part numbers.The central hat section of our rotor is made from strictly U.S. sourced 6061-T6 aircraft specification aluminum. The disc is made from our own proprietary cast iron, poured in the USA and machined from start to finish in house at Girodisc. The rotor utilizes a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc.The rotor and hat have a floating mount system, which utilizes 8 or 10 high strength alloy steel drive pins, manufactured by Girodisc in the USA to our own specifications and cadmium plated for a long lasting corrosion resistance. These pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. The pins are secured by grade 12 cap screws with hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor to self center between the pads.Once the Girodisc system is in place, simply replace the cast iron rotor when needed. Sold/priced in pairs

Thunderhill is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline. Fits Lamborghini Aventador The GiroDisc system is a direct replacement for the OEM brake disc. The 2-piece floating disc will bolt directly to the car and work with OEM calipers perfectly. By upgrading your brakes with these lightweight high-performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. The Giro Disc rotors are lighter than OEM pieces. The reduction in rotational and unsprung weight allows for quicker acceleration and suspension response. When used with Pagid or PFC performance brake pads, and Thunderhill RF-1 brake fluid (also available from CompetitionMotorsport.com), you have an amazing solution to overheating, cracking and warping rotors. The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. The disc is manufactured from cast iron which is constructed in the USA and is made to the same specification with the same material used by professional racing organizations. The rotors curved vane design was developed in racing and acts as a centrifugal pump to force cooling air through the disc. The rotor and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by GiroDisc in the USA to our own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. The 2-piece GiroDisc design allows for rotor only replacement as well to minimize future replacement costs and deliver outstanding performance and cooling. Sold/Priced per pair.

FITMENT (FRONT): McLaren 570S McLaren 650S Thunderhill is an authorized dealer for Girodisc products and we are one of the largest stocking dealers in the country. We ship most Girodisc systems the same or next business day to ensure we meet your delivery deadline. The Girodisc system for the McLaren 650S or 570S is a direct replacement for the OEM carbon ceramic rotors. They use a different brake pad than the OEM carbon ceramic rotors, with an annulus (pad swept area) of 66mm or less. This is done to keep rotor weight low. (A steel/aluminum rotor with the same annulus as the OEM carbon ceramic rotors would be unnecessarily heavy.) We recommend the Pagid 8081 racing brake pads for this Girodisc system, in either RS29 (endurance) or RS14 (sprint) compound. The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. The disc is made from cast iron to the same specification and material as used by professional racing organizations. It is a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc.The rotor and hat have a floating mount system, which utilizes 10 high strength alloy steel drive pins, manufactured by Girodisc to our own specifications and cadmium plated for a long lasting corrosion resistance. These pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor to self center between the pads.Once the Girodisc system is in place, simply replace the cast iron rotor when needed. When used with Pagid 8081 pads and high-temp racing brake fluid, you have a truly amazing, race-proven solution to the fragile, ultra-expensive carbon-ceramic rotors on your McLaren.

FITS: MCLAREN 720S (CCB Rotor) The Girodisc system is a direct replacement for the OE CCB disc on all vehicles that came equipped with CCB rotors from the factory. The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. The disc is made from cast iron to the same specification and material as used by professional racing organizations. It is a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc.The rotor and hat have a floating mount system, which utilizes 10 high strength alloy steel drive pins, manufactured by Girodisc to our own specifications and cadmium plated for a long lasting corrosion resistance. These pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor to self center between the pads.Once the Girodisc system is in place, simply replace the cast iron rotor when needed. When used with performance pads and hi-temp fluid, you have what amounts to a truly amazing solution to overheating or warping rotors. Sold/Priced per pair.

Thunderhill is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline. Fits Ferrari 430 with OEM CCM Rotors (Conversion to Iron) The GiroDisc system is an upgrade to a 2-piece steel rotor and aluminum hat combination and is a direct replacement for the OEM brake disc. The 2-piece floating disc will bolt directly to the car and work with OEM calipers perfectly. By upgrading your brakes with these lightweight high-performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. The Giro Disc rotors are lighter than OEM pieces. The reduction in rotational and unsprung weight allows for quicker acceleration and suspension response. When used with Pagid or PFC performance brake pads, and Thunderhill RF-1 brake fluid (also available from CompetitionMotorsport.com), you have an amazing solution to overheating, cracking and warping rotors. The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. The disc is manufactured from cast iron which is constructed in the USA and is made to the same specification with the same material used by professional racing organizations. The rotors curved vane design was developed in racing and acts as a centrifugal pump to force cooling air through the disc. The rotor and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by GiroDisc in the USA to our own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. The 2-piece GiroDisc design allows for rotor only replacement as well to minimize future replacement costs and deliver outstanding performance and cooling. Sold/Priced per pair.

These Girodisc rotors are a direct replacement for the OE rotors on the Super Trofeo with the addition of the provided caliper spacers. At 380mm diameter, these Girodisc rotors are slightly larger than the 365mm OEM rotors. The Girodisc front rotors are 24.5 lbs vs. 27.0 lbs for the stock units. By upgrading your brakes with lightweight, high performance replacements as opposed to a big brake kit, your factory brake bias and ABS effecitveness are not compromised. The reduction in rotational and unsprung weight allows for quicker acceleration, better brake feel, and more precise suspension response. The central hat section of the Girodisc rotor is made from strictly USA-sourced 6061-T6 aircraft specification aluminum. The disc is made from Girodisc's own proprietary cast iron, poured in the USA and machined from start to finish in house at Girodisc. The rotor utilizes a curved-vane design, developed in racing to act as a centrifugal pump forcing cool air through the disc. The disc and hat have a floating mount system, which utilizes 12 high-strength alloy steel drive pins, manufactured in the US by Girodisc and cadmium plated for long-lasting corrosion resistance. These pins take the loads from braking while maintaining the axial and radial float between the hat and disc. They are secured by class 12.9 cap screws and hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise springs on the disc side, allowing the iron disc to expand as it heats up while eliminating the rattle and noise commonly associated with floating rotors. This float also allows the rotor to self center between the brake pads. Once the Girodisc system is in place, you simply replace the cast iron discs when needed. This reduces cost over time by allowing you to re-use the aluminum central hats. Sold/priced per pair

Thunderhill is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline. Fits Lamborghini Gallardo Super Trofeo The GiroDisc system is a direct replacement for the OEM brake disc. The 2-piece floating disc will bolt directly to the car and work with OEM calipers perfectly. By upgrading your brakes with these lightweight high-performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. The Giro Disc rotors are lighter than OEM pieces. The reduction in rotational and unsprung weight allows for quicker acceleration and suspension response. When used with Pagid or PFC performance brake pads, and Thunderhill RF-1 brake fluid (also available from CompetitionMotorsport.com), you have an amazing solution to overheating, cracking and warping rotors. The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. The disc is manufactured from cast iron which is constructed in the USA and is made to the same specification with the same material used by professional racing organizations. The rotors curved vane design was developed in racing and acts as a centrifugal pump to force cooling air through the disc. The rotor and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by GiroDisc in the USA to our own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. The 2-piece GiroDisc design allows for rotor only replacement as well to minimize future replacement costs and deliver outstanding performance and cooling. Sold/Priced per pair.

BBS RI-S 2-Pc Forged Line Exclusive Wheels Call and talk to a Thunderhill custom wheel specialist at (844) 438-7244. We'll make sure you get the set of wheels you've always wanted at a price no one can beat. BBS RI-S Two-Piece Forged Line Exclusive Wheels are forged aluminum wheels designed and produced in the renowned BBS Motorsports Department. The RI-S two-piece wheels use titanium fasteners and the rims are machined using a BBS-patented process to reduce weight. They all come with a diamond-cut rim and clear protective top coat. All RI-S 2-Pc Forged Line Exclusive wheel weights are optimized using FEA (Finite Element Analysis). FEATURES Two-piece forged aluminum wheel. Titanium fasteners. Rim sections machined using a BBS patented process to reduce weight. Weight optimized by FEM analysis. WHEEL WEIGHTS 20x8.5: 24.5 lbs. 20x9.0: 26.0 lbs. 20x10.0: 26.0 lbs. While many popular fitments are stocked and ready to ship, some fitments are made to order, increasing lead times. Check with a Thunderhill wheels specialist at (844) 438-7244 for a complete quote and estimated lead time. "PFS" centerbore designation means the wheel comes with the BBS Precision Fitment System. Prices and weights are per wheel.

FERRARI 458 CHALLENGE This Girodisc system is a direct replacement for the OEM front CCM rotors on the 458 Challenge, although a different brake pad with an annulus (pad swept area) of 66 mm or less must be used. We suggest the Pagid 8081, the most popular pad used with Girodisc rotors on the 458 Challenge. The lower-annulus design of the Girodisc rotors keeps weight low without sacrificing braking performance. The central hat section of the Girodisc rotor is made from strictly U.S. sourced 6061-T6 aircraft specification aluminum. The disc is made from their own proprietary cast iron, poured in the USA and machined from start to finish in house at Girodisc. The rotor utilizes a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc. The rotor and hat have a floating mount system, which utilizes 12 high strength alloy steel drive pins, manufactured by Girodisc in the USA to their own specifications and cadmium plated for a long lasting corrosion resistance. These pins take the load from braking action while maintaining the axial and radial float between the hat and disc. The pins are secured by class 12.9 cap screws with hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor to self center between the pads. Once the Girodisc system is in place, simply replace the cast iron rotor when needed. Sold/priced in pairs.

CMS Performance Bolt In Roll Bar For BMW E92 M3 This Roll Bar Fits the Following Cars: BMW E92 M3 (2008-2013) BMW E92 M3 Competition Package ZCP (2011-2013) BMW E92 M3 GTS (2011) The Premium Roll Bar for BMW's Legendary E92 The CMS Performance Roll Bar is the strongest, safest, most beautifully constructed bolt-in roll bar on the market for the BMW E92 M3. It is engineered to easily bolt into any E92 variant, giving you rollover protection while adding to the motorsport-derived style of the E92 M3. Engineered with a premium put on safety and structural rigidity, the exceptional design of the CMS Performance E92 M3 Roll Bar integrates perfectly with the car's luxury/sport interior. CMS uses only advanced Docol R8 Advanced High-Strength Steel tubing throughout each roll bar, giving you unequalled tensile strength, energy dissipation, and occupant protection. Docol R8 is 15% stronger than 4130 CrMo steel and 30% stronger than mild (DOM) steel used by other roll bar manufacturers. It is superior in every way: resistance to deformation, weld strength, and energy dissipation. A Roll Bar Design as Bulletproof as the M3 Itself CMS Performance designed the E92 roll bar with a one-piece main roll hoop featuring reinforced X-bracing along with a horizontal harness bar. (X-brace gussets can be added as an option add even more strength and rigidity.) The harness bar is specifically designed to locate racing harness shoulder straps at the proper angle (0° to -20°) in most seating positions. Every CMS Performance E92 M3 roll bar bolts directly to the BMW's chassis, forming the rock-solid backbone of your roll-over and impact protection. Rearward kicker support angles are optimized for structural integrity and easy installation, while preserving your unobstructed rear view. Cuting Edge Materials and Direct Bolt-In The CMS Performance BMW E92 M3 Roll Bar is designed to bolt directly to the M3 chassis' strong points without the need for any modification of existing interior trim or use of backing plates underneath the car. Adding a CMS custom designed rear seat delete gives the whole installation a clean, factory appearance. Full 360o TIG welding throughout gives every CMS Performance roll bar unsurpassed strength and durability. Each roll bar includes custom powder coating in your choice of matched BMW M3 factory colors. We also offer technical color powder coat finishes like the amazing Superchrome! Or, go with satin black for a more understated appearance. CMS Performance has over 5,000 custom powder coat colors to give you a truly customized look. The Best Materials, Design and Construction Set CMS Performance Apart Our unwavering focus on using cutting-edge materials, unsurpassed design and construction, and premium fit&finish has taken CMS Performance Roll Bars to the top of the industry. The BMW E92 M3 roll bar is the latest addition to our growing catalog, bringing safety, integrity, and beauty to your M3 whether on the street or at the track! Click Here for Installation Instructions BMW E92 M3 Roll Bar Options: Main hoop X-brace gussets can be added for $200 CMS Roll Bar Harness Collars help keep your harness shoulder straps where you want them CMS Performance BMW E92 M3 Roll Bar Details: Manufacturer: CMS Performance Manufacturer part no.: PRB158 Material: 1.75″ X .090" Docol R8 Advanced High Strength Steel tubing Design: one-piece main hoop and three-piece kickers ease installation Hardware: American-made Grade 8 hardware included BMW E92 M3 Roll Bar Features: CNC-cut mounting plates Designed, built, and finished by CMS Performance in the USA American-made CNC machined solid steel interlocking joints Allows full seat travel with virtually any seat Detailed installation instructions Installation requires removal of the factory rear seat bottom cushion. This product is intended for off-road race track use only.