This is an excellent replacement turbo for those looking for substantial power gains while maintaining streetability. The IHI VF-34 Turbo is found on some of the limited production Subaru's such as the v7 WRX STI-RA. This turbo is degined from the VF30 but features a more advanced bearing design which will allow your turbo to spool 300-500+ RPMs Quicker than the VF30 without lossing any power. The VF34 is capable of 350+ crank HP. This turbo is a direct bolt-on for the WRX/STI. Some type of fuel/engine managment is required for use with this turbo.