Turbo Upgrade RHF55 18G VF39 VF43 VF48 For Subaru STI 2.5L 04-19 WRX 2.0L 02-07
NOTE: This is Journal Bearing Type Turbo( Not ball bearing )

Turbo modelAssumed Max PowerCompressor WheelTurbine Wheel
In Dia (mm)Ex Dia (mm)In Dia (mm)Ex Dia (mm)
OEM Turbo-46.5605348
UHF550 Performance550HP50.3685348

1, RHF55-18G New Design Upgrade CURVED Billet wheel 10 Blades 

2, UHF Turbine Wheel 5+5 Design, UHF (Ultra High Flow), its mission was to maximize flow capacity and raise efficiency

The IHI VF48 Subaru turbocharger that comes equipped on the 2008+ STI. This can be used in place of your 04-07 STI's VF39 / VF43 stock turbo, or act as an upgrade turbo for the TD04 equipped 02-07 WRX. 

Applicable models :
2004-2006 2.5L STI (OEM TURBO UNIT MARKING: VF39)
2007 2.5L STI (OEM TURBO UNIT MARKING: VF43)
2008-2019 2.5L STI (OEM TURBO UNIT MARKING: VF48)
2002-2005 2.0L WRX (OEM Turbo TD04)
2006-2007 2.5L WRX (OEM Turbo TD04)
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