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)