the 4.11 gearbox that includes the JDM wrx is great. the USDM WRX gearbox is often a POS compared, trust me. you'll be wanting to employ the correct JDM gearbox with the right JDM EJ20 motor.cartridge assembly. The VF34 will spool up close to 250RPM quicker compared to the VF30, which makes it an excellent all round performer. Ball bearing turbo wi