Barnett Dirt Digger high performance clutch kits feature clutch plates made with our exclusive carbon friction material, tempered steel drive plates, and a set of heavy duty springs that are 10-15 percent stiffer than OEM. The carbon fiber and DuPont Kevlar materials provide a stronger, more positive engagement and the "segmented" friction material design increases oil flow to the clutch providing a smoother, more consistent performance and increased clutch life. The heavy duty springs are shot-peened and heat-treated for extreme durability. All clutch kits are pre-measured for proper stack height prior to packaging to ensure reliable fit and performance.