the four.eleven gearbox that comes along with the JDM wrx is awesome. the USDM WRX gearbox is usually a POS compared, believe in me. you'll be wanting to use the correct JDM gearbox with the correct JDM EJ20 motor.could it be superior? of course its fantastic, but $2000 of tuning bits dosnt appear to be a very good offer on top of the inventory EJ2