GrimmSpeed BB500 Turbocharger - 2002-21 Subaru WRX/STI, Forester XT, Legacy GT & Outback XT

GRM123006 - GrimmSpeed BB500 Turbocharger - 2002-21 Subaru WRX/STI, Forester XT, Legacy GT & Outback XT

Take Your Subaru to the Next Level with a GrimmSpeed Turbocharger

The GrimmSpeed BB500 is a stock-location OE-replacement turbocharger developed for Subaru EJ-series turbo engines. Its proprietary compressor, turbine, CHRA, and wheel designs are engineered for quick spool, robust operation, and strong performance when paired with the required supporting modifications.

Quick Specs

• Compressor wheel (inducer/exducer): 55.1 mm / 74.6 mm, 54 trim
• Turbine wheel (inducer/exducer): 60 mm / 55.1 mm, 84 trim
• Compressor flow: 55 lb/min
• Compressor inlet diameter: 2.4 in.
• Compressor wheel material: Billet 2618
• Compressor housing alloy: A356
• Turbine housing alloy: D5S
• Bearing type: Ceramic ball bearing with silver-plated 4340 bearing cages
• Dual piston rings and advanced oil-flinger design
• Compressor A/R: 0.65
• Turbine A/R: 0.88
• Adjustable wastegate: Pre-set at 18-20 psi base pressure

Vehicle Fitment

• 2004-2021 Subaru STI
• 2002-2007 Subaru WRX (other modifications required)
• 2004-2008 Subaru Forester XT (other modifications required)
• 2008-2014 Subaru WRX with GrimmSpeed intercooler, STI-style conversion hose, and other required supporting parts
• 2005-2009 Subaru Legacy GT with GrimmSpeed intercooler, STI-style conversion hose, and other required supporting parts
• 2005-2009 Subaru Outback XT with GrimmSpeed intercooler, STI-style conversion hose, and other required supporting parts

Compatibility note: Not compatible with the OEM secondary air pump system.