Action Clutch multi-disc racing clutches are designed for high performance racers who push their vehicles to the limit. The 8.5in Twin Disc race kits feature two sintered metallic race discs, formulated in the USA, which offer superior heat capacity and a smoother engagement than any other disc on the market. It also comes with a Ventilated 6061-T6 Billet Aluminum clutch cover design to help reduce overall weight and improve throttle response which is paired with our high strength steel pressure and floater plate. This added clamping force won't require twice the pedal pressure. Action Clutch's 8.5" Twin Disc race kits are designed to maximize performance under extreme conditions and are perfect for those looking for reliable power regardless of racing type. With added features like enhanced heat capacity and improved throttle response, these clutches will help you get off that starting line as quickly as possible and keep you running smoothly through the finish line.