Such firm, consistent engagement is easy to control yet expect some chatter from street applications with rear gearing under 3.73. The 8-spring hub features RAM poly-coil damper springs encased in polyurethane for greater load capacity and extended hub life. Units can handle three times the shock load of just the coil spring (standard in all RAM Competition Discs). Kits include disc, pressure plate, alignment tool, and release bearing unless otherwise noted.