Viper FCDC-2D Unassembled Two-Disk Clutch Kit #4 - Blue Vented Drum - 4-Cycle RacingDialing in your engagement RPM is the critical difference between a holeshot and getting swallowed by the pack, which is why serious builders demand top tier racing go kart engine parts like the Viper Unassembled Two Disk Clutch Kit #4. Designed for 4 cycle sprint and endurance racing, this kit puts the power of custom lock up tuning directly into your hands. By arriving unassembled, it forces you to intentionally select the springs and weights that