IHI VF22 turbocharger – WRX upgrade
This is a genuine IHI VF22 turbo. This is a common upgrade for WRXs it utilises the largest P20 exhaust housing but still manages to spool rather quickly. It also features the largest compressor inlet diameter of all the bolt on IHI units. With the right supporting equipment, 17 psi can be achieved by 3,000 RPM and a full 21-22 psi is reached with merely 250 more rpm. This turbo makes for an adequate streetable upgrade that combines quick responsiveness with a powerful midrange and topend curve.