in short its a dual mode crank wheel that will allow the engine to rev smoother all the way through and prevent the level of roghness and crank whip that we stock boys have.. good piece of insurance, get one.

-Matt "Pain heals, chicks dig scars, and glory lasts forever!" will do/pay just about anything for the following parts: CF sunroof glass replacement OEM CF trunk Non OEM style cf or fiberglass hood not the cf1 design