Qualities of the CCI Lightweight Steel Flywheel: Preserves low end torque and drive ability One piece ring gear for high durability Weighs 11.9 lbs. Well suited for Stage 1 and Stage 2 clutch kit applications Stamped with 4140 plate with 2000 ton pressure at 1260 degrees CNC machined and balanced to O.E. specifications Reduced Mass = Increased Accleration Meets and exceeds SFI 1.5