[MrPbody]

Center Force is the most popular out there today. You can get a single or dual disc version. This is a "compensated diaphragm" design, made to increase pressure as RPMs increase, unlike standard diaphragm types that will actually pull away as RPMs increase. Ram also makes very good street performance clutch sets. McCleod and Hayes have been around forever. Good, but not leading edge.

A diaphragm type is more desireable for a street-driven car, as the pedal effort is significantly lower than the "Borg & Beck" design. For racing, the B&B is a better choice. You can identify either by the "fingers" in the center. A diaphragm will have many (like 12 or 16) "fingers", while the B&B will have three.