The kartboy replacement lever for the Subaru WRX STi 6 Speed is the first non-Subaru version available. With a height reduction of 1" and a redesigned mechanical advantage, a throw reduction of 40% is achieved. CNC machined and Tig welded in the USA. Matched with a set of kartboy shifter bushings (available separately), a major improvement in the shifting is immediately felt, while retaining the factory reverse lock-out