Top Race Performance clutch covers are built from the ground up as a performance clutch. We do not take stock/oem clutch pressure plates and modify them. All TRP pressure plates are 100% tested and computer balanced. Top Race Performance has been using state of the arc technology such as CATIA (3D Design) and DEA (Finite Element Analysis) engineering, the most advanced design and engineering tools are brought together to reach each customers requirement. What we focus on the most is the Diaphragm spring, which is a key component in a clutch cover assembly. They are made of hard steel and undergo a 6-stage heat treatment process for high clamp load, which provides high TQ/HP capacity. Using stronger drive straps and thicker rivets ensures that no breakage during high acceleration will happen. All pressure plates are tested on our bench machines, which simulate harsh driving conditions. We also check for proper release and the point of engagement.  Top Race Performance Stage 1 clutch kit features a High Copper Steel-back Organic lining which provides a smooth engagement but also provides higher TQ capacity and heat dissipation due to the high copper content. This is the preferred clutch for street and mild racing applications. Drivability is similar to the stock clutch but with a better engagement due to the copper content. All TRP clutch discs have spring center dampers to reduce drivetrain shock. The exclusive sprung hub design uses thick-walled retainers that form a pocket around the springs to protect them from popping out, and also resulting in less vibration and more consistent launches. All hubs are heat treated for strength and durability. Our clutch covers have a hardened ductile iron friction plate which can withstand an excessive amount of heat. We use three drive straps and thick rivets to provide extra strength when in action. The advanced facing material provides the high heat resistance essential for motorsports. It was developed by paying close attention to the copper wire ratio and also the composition of high strength fiber. With improved high heat resistance, it provides the functionality essential for street performance and mild racing applications. Best clutch kit for street use and mild racing applications. This clutch kit is equivalent to EXEDY stage 1 racing clutch.