The 4.11 gearbox that comes with the JDM wrx is great. the USDM WRX gearbox is often a POS compared, rely on me. you will need to use the proper JDM gearbox with the appropriate JDM EJ20 motor. cartridge assembly. The VF34 will spool up close to 250RPM a lot https://kurtp789pey9.nico-wiki.com/user