Clutch Masters Steel K Swap Flywheel designed to work with the adapter plate and a K series engine to S2 transmission. We strongly recommend the steel flywheel over the aluminum on K24's that are spending a lot of time in the higher RPM's. The long stroke of an inline 4 produce some intense harmonics that can result in transmitting those harmonics into your clutch, or even worse, cause loose/broken flywheel bolts. DO NOT USE your S2000 flywheel bolts. They are too long and will bottom out before properly fastening. We sell the correct bolts.