the four.eleven gearbox that includes the JDM wrx is amazing. the USDM WRX gearbox is usually a POS in comparison, have confidence in me. you will need to work with the right JDM gearbox with the appropriate JDM EJ20 motor.cartridge assembly. The VF34 will spool up close to 250RPM more rapidly when compared to the VF30, making it a fantastic all sp