IHI-VF22 Turbocharger Assy.
Originally used on Ver.3 JDM WRX & WRX RA models. This is the largest of the VF series turbos and is recommended for use on cars with significant modifications and where flow capacity is more important then response time. Ball bearing center section with large P20 turbine housing. Turbo will start to come on boost at 3300 rpm, however is capable of running up to 25 psi @7000 rpm
IHI-VF23 Turbocharger Assy.
Originally used on Ver.3 STi models. Also used on the limited production 22B. Similar to the VF22 but with a slightly smaller compressor side for better response while sacrificing some top end performance. Good compromise turbo that will work well in a variety of situations. Has considerably less turbo lag than the VF22 as this turbo will start to come on boost at 3000 rpm, and by 3200 rpm is capable of 20 psi @7000 rp
IHI-VF24 Turbocharger Assy.
Essentially identical to the VF29 and VF28. The VF24 was originally used on the STi Ver.4, the VF28 on the STi Ver.5 & 6 and the VF29 on the JDM WRX's of the same period. This turbo uses a P18 turbine housing and relatively small compressor for fast response and excellent low and mid-range performance. Ball bearing center section. Excellent bolt-on replacement for the standard WRX turbo on cars without any other major modifications.
IHI-VF34 Turbocharger Assy.
Identical to the VF30 but with a ball bearing center section. Used on the STi RA Spec. C model. Provides slightly improved response over the VF30 and better reliability with anti-lag systems. This turbo will start to come on boost at 2700, and by 3000 rpm is capable of 18.5 psi @7000
