Installation of a lightweight flywheel on your engine will reduce rotational mass on the crankshaft, producing faster revs, less drive train loss, quicker acceleration and more power to the wheels. The Competition Clutch ST lightweight flywheel is designed for street driven applications and is well suited for Stage 1 or Stage 2 clutch kit counterparts. All Competition Clutch lightweight flywheels are CNC machined and balanced to OE specifications exceed SFI 1.5 quality assurance specifications. Unlike many other brands, the Competition Clutch ST flywheel is compatible with ALL performance and stock clutch assemblies for ultimate versatility.