Block : EJ20 Standard, Turbo : IHI VF42, Intercooler : STi, Fuel pump : OEM, Injector Rail : STi, Regulator : STi, Exhaust system : STi (Titanium S 204), ECU : S 204. Transmission. Gear : STi 6 Speed, Quick shift : STi, Clutch kits : STi, Differential : STi (S 204), Limited slip : STi. Suspension & Brake Is it safe to run the VF42 on 24 psi in the long-term? I'm planning to replace my VF36 and upgrade to a VF42 on my Spec-C. 2. Do you have a source where I might be able to find an used IHI VF42 turbo? They are very hard to find where I live, maybe it's easier in Russia, there are alot of RA-R Imprezas in...