The Competition Clutch Super Single was developed for cars not quite ready for a twin but needing something more than the conventional Stage 4. The Super Single mirrors a twin disc in the fact that they both are a 7.25" set up and have a 4140 forged steel flywheel. Unlike the twin, the Super Single only uses one disc and tips the scales around 17-20lbs depending on application. Honda Civic B16A/B16A2/B18B/B18C/B20 1.6/1.8/2.0L Super Single Ceramic Clutch Kit. Old P/N 4S-8026-C.