Competition just release two version of flywheels the ST version and STU version, here are the spec
The STU flywheel is recommended for forced induction and/or track and rally racing applications. This flywheel will work with ALL performance and stock clutch assemblies. Qualities of the CCI Ultra Lightweight Steel Flywheel: One piece ring gear for high durability Weight varies from 8 lbs. to 10 lbs. depending on application Well suited for Stage 3 and up 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
The ST flywheel is recommended for naturally aspiriated and/or street driven applications. This flywheel will work with ALL performance and stock clutch assemblies. Qualities of the CCI Lightweight Steel Flywheel: Preserves low end torque and drive ability One piece ring gear for high durability Weight varies from 11 lbs. to 14 lbs. depending on application 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
