By disabling the factory slipper clutch, this kit eliminates the harsh grab-and-jerk of the stock setup, allowing riders to launch smoothly from a dead stop. The result is longer clutch life, improved drivability, lower ETs, and more MPH. Engineered for Performance The Super Stock kit includes extra heavy-duty clutch springs and precision shims to increase clutch pressure without introducing chatter or sacrificing top-end speed. With shim-adjustable spring tops, riders can fine-tune their setup to find the perfect balance of launch control and performance. Each spring is made from valve-spring quality steel, shot-peened and stress-relieved to withstand the extreme heat and stress of high-horsepower drag racing. This attention to detail ensures consistent performance and reliability pass after pass. FEATURES Eliminates ‘bucking’ during dead-stop launches – smoother takeoffs, lower ETs Disables factory back-torque limiter (slipper clutch) for improved drag-style performance Smoother operation, longer clutch life, and improved drivability Heavy-duty clutch springs – increased lever pressure for more consistent power transfer Valve-spring grade material, shot-peened and stress-relieved for durability Includes .025" and .062" thick steel shims for pressure adjustment Black oxide finish with engraved Brock’s Performance logo