This Hot Street™ Clutch kit fits 1986-1993 small block Chevrolet externally balanced engines. It offers ultimate Street/Strip performance through matched components. A 10.5-inch metallic disc with a 6-spring helix sprung hub provides the superior grip needed for the strip, while the matched diaphragm style pressure plate provides a pedal feel comfortable enough for the street. This provides 30% more clamping pressure and transmits that through a billet steel flywheel. These matched components provide the peace of mind purchase you've come to expect over the years from Hays.