NOTE: Information for reference purpose only (No responsibility is accepted for incorrect data)

VF22 WRX Japanese domestic market Best turbo for high output engine. Highest capacity of all IHI “STi” turbo’s. OK for high boost or stroker engines. Best fitted with cars that at least have a front mount intercooler. Not recommended for really big boost stroker engines or cars that run over 25 psi boost. Same Turbine housing and wheel as a VF23 (20) with larger Compressor housing. Only fit this turbo if you have at least an exhaust, front mount intercooler and air inlet modifications. Its good also if you plan internal engine modifications. This turbo has the most lag of all the VF series.	VF22 inlet 5 blades
VF23 Sti Ver 3 June 1996 Good all round turbo with straight inlet path. Same compressor housing and wheel as a VF24 with larger Turbine housing (20) Great turbo for mildly modified cars and those who are unsure of their plans for the future.	TD05 (left) and VF 23 (right) TD05 (left) and VF 23 (right) TD05 (left) and VF 23 (right)
VF24 STi ver 4, June 1997 Common for Group N rally cars and has good bottom end. Not recommended for stroker engines or engines with high boost as turbo is small and can over speed. Same compressor housing and wheel as a VF23 with smaller Turbine housing (18) Best turbo for Auto’s and cars that want the best bottom end and least lag.	VF24 inlet, 6 blades
VF28 STi Ver 5, June 1998. Basically the same as VF24
VF29 WRX Japanese domestic market Basically the same as VF24 except has a different location for the pressure hose on the waste gate actuator Compressor wheel is slightly different.
VF30 STi ver 7Oct 2000 A totally new design and shape “VF” series turbo. Common on Group A rally cars where more capacity is required than is possible with the VF24. Good turbo as compromise between the VF23 and VF22, as it has the same size turbine housing as a VF24 and a compressor housing similar to a VF 22. A relatively new turbo t o the market and still being “tried and tested” early indications are it will replace the VF 23, with slightly more capacity.	VF30 turbo VF30 inlet 6 blades
Garret 400 HP Bolts to manifold ok, but requires some modifications to fit due to size of compressor housing. Also requires minor modifications to oil drains and supply lines. Should only be fitted with at least a Electronic Boost controller and works best with a whole new ECU. Designed for cars that are going to run over 20 psi and produce over 200Kw at the wheels (4WD 4th gear.)
Garret 450 – 500 HP Similar spec to 400 hp just bigger! Bolts to manifold ok, but requires some modifications to fit due to size of compressor housing. Also requires minor modifications to oil drains and supply lines. Should only be fitted with at least a Electronic Boost controller and best with a whole new ECU. For cars that are going to run in excess of 20 psi and over 200Kw at the wheels (4WD 4th gear), i.e. Stroker’s, big head work and Cams.