Type RA and Type STi gear sets feature a unique cryogenic & micro-finishing treatment. Each set includes a complete set of transmission gears, custom speedometer calibration gear, and all necessary parts for installation into any WRX '99 through '06. The Type RA set is a very close ratio type while the Type STi maintains the same 4th & 5th ratios as stock on the WRX.

Includes Micro Finish