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Subaru Twin Scroll T4 Turbo Kit

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Subaru Impreza WRX & STI T4 Twin Scroll Turbo Kit

This turbo kit isnt for everyone. It works best on a built motor, and more work to install than a stock location turbo. However – it is our top selling turbo kit, and we snagged the 2016 Unlimited AWD Global Time Attack championship with an off-the-shelf setup.

Full-Race engineers designed this kit to generate the broadest possible power band with huge area under the curve. This is not intended to go 8s in the quarter mile. Optimal performance with fast throttle response, early spool and huge top-end power – while being flexible enough to grow with your future needs. Full-Race recomends using T4 frame turbochargers such as BorgWarner Airwerks, EFR, or Garrett, Turbonetics, etc. The S300SX FMW has proven to be an outstanding high power performer on the EJ25 engine.

Whether you are road racing, drag racing or building a “street weapon” daily driver, the Full-Race Twin Scroll Turbo Kit is adaptable to suit any chassis and application, now including the popular 08+ STI and 05+ Legacy GT and 11+ STI.

Full-Race Subaru Impreza WRX/STI T4 Twin Scroll Turbo Kit Includes:

  • Full-Race Subaru WRX/STI Lower Manifold
  • Full-Race Subaru WRX/STI T4 Twin Scroll Up-Pipe
  • Full-Race Subaru WRX/STI T4 Twin Scroll Downpipe
  • Full-Race Subaru WRX/STI T4 Twin Scroll Kit Box

Full-Race Lower Manifold

Full-Race Twin Scroll Up-Pipe

Full-Race Twin Scroll Downpipe

Full-Race Kit Box (Fittings, Hardware, and Lines)

Optional Turbocharger

BorgWarner S200SX 75-70
BorgWarner S300SX 83-75

 

BorgWarner S300SX 91-79
Garrett Twin Scroll GT35R

 

Garrett Twin Scroll GT40R

 

Optional Full-Race Subaru Reverse Mount Intercooler Kit

Note: Currently only available for the 2004-2007 WRX/STI

Black Anodized

Optional TiAL MVS Wastegates


Optional TiAL Q Blow Off Valve


Optional High Temperature Coating

Applications

2011+ STI:

GR Chassis 08-10 WRX/STI, shown with BorgWarner Twin Scroll S300SX FMW Turbo:

GD Chassis 04-07 WRX/STI, shown with BorgWarner Twin Scroll EFR 7670 Internal WG Turbo

GD Chassis 04-07 WRX/STI, shown with Garrett Twin Scroll GT40R Turbo:

GD Chassis 04-07 WRX/STI, shown with Garrett Twin Scroll GT35R Turbo: