Subaru OEM IHI VF Series turbochargers are a direct bolt-on option for the 02-07 WRX & STI, utilizing the factory mounting points and attaching to the factory oil and coolant lines. These turbos are a great upgrade option for 2.0L WRX owners looking to make significantly more power and still retain OEM quality and fitment. These turbochargers are also compatible with many engine management base maps, eliminating the need for custom tuning in some circumstances. 2.5L WRX models (2006-2007) will also benefit from a VF series turbo upgrade, however gains will not be as dramatic as on the 2.0 models as the larger displacement motor will suffer from a taper in power in the high RPM range. STI owners should consider these turbochargers as an OEM replacement only. As with all turbo upgrades, these Subaru OEM VF series turbos will require fueling and tuning upgrades to operate safely.
- IHI Series Turbo Specs:
- The IHI VF39 comes stock on the 04-06 US Market STI, and is a well proven upgrade path for the WRX. The VF39 uses a thrust bearing setup with a P18 exhaust housing capable of 285 whp on the EJ20. If you are considering the VF39, we highly suggest checking out the VF43 as it is a more efficient setup in the same class.
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