More Subaru STi 2008-2014 parts:
All Subaru STi 2008-2014 parts | Brakes | Drivetrain | Engine | Exhaust | Exterior | Intake | Interior | Suspension | Turbo | Cooling | Wheels | Fuel | Fluids | Wheel Accessories | WheelSpacers | Electronics
Shop tuning and engine management parts for the Subaru WRX STI 2008–2014 (GR/GV chassis). The GR hatchback and GV sedan run the EJ257 2.5L turbocharged flat-four, and this generation added SI-Drive with Intelligent, Sport and Sport Sharp modes the driver can switch between. You will find engine management, ECU tuning and programmers here — every part in this collection is fitment-tagged for the 2008–2014 WRX STI, so check your year and body style against the product fitment notes before ordering.
What tuning and engine management parts fit my Subaru WRX STI 2008–2014 (GR/GV chassis)?
Every tuning part in this collection is fitment-tagged for the GR/GV-chassis WRX STI (2008–2014) with the EJ257 — GR hatchback and GV sedan. US cars are the EJ257/VF48 combination (the EJ207 is the JDM engine), so match calibrations to the US car and confirm your year on the product page before ordering.
What does SI-Drive do, and do bolt-ons still need a tune?
SI-Drive is the factory system with three modes — Intelligent, Sport and Sport Sharp — that change how the car responds. Separately, enthusiast sources stress the need for a proper tune after bolt-ons on the EJ257, as part of avoiding detonation-related ringland concerns. Treat SI-Drive as a driving-mode selector and a real calibration as its own job, planned with the parts you fit.
Where can I find other parts for my Subaru STi 2008-2014?
Start with the full Subaru STi 2008-2014 collection linked at the top of this page, or jump straight to a category — Brakes, Drivetrain, Engine, Exhaust, Exterior, Intake and more are all linked above, and every one of them is scoped to the Subaru STi 2008-2014 only.