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Full-Race engineers, following our commitment to constant improvement, took our legendary Twinscroll Subaru WRX/STi Rotated Mount turbo kit and updated it for 2009. Design changes allow the Gen2 Twinscroll to flow more, weigh less, fit multiple generation subaru chassis and most importantly - generate the broadest possible powerband with huge area under the curve. Consisting of the necessary turbocharger hotside upgrade components, Full-Race has engineered these kits to offer optimal performance with instant throttle response, early spool and huge top-end power, all while being flexible enough to grow with your future needs and driving styles. Whether you are road racing, drag racing or building a "street weapon" daily driver, the Gen2 kits are custom specced to suit any application, now including the popular 08+ STI and 05+ LGT.
Available with twin Tial MVS wastegates and your choice of a twinscroll BorgWarner Airwerks turbocharger or a twinscroll Garrett GT ball bearing turbocharger. Headers include Full-Race's warranty against cracking. Fits 08+ STi, 05+ LGT and 04-07 WRX/STIs.
Through ideal cylinder pairing and the proper implementation of Twinscroll technology, huge increases at the low end, midrange and top end can be realized, all while minimizing pool time and improving throttle response.See image below for an illustration.
Kit Includes:
Full-Race Lower Turbo Manifold, T4 Up-Pipe, downpipe, and Dual Tial MV-S (38mm) wastegates
Your Choice of Twinscroll T4 Turbocharger
| Garrett Twinscroll GT35R. |
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Garrett Twinscroll GT4088R. |
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| BorgWarner S200SX 75-70 |
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BorgWarner S300SX 83-75 |
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| BorgWarner S300SX 91-79 |
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Full-Race Hardware, Fittings & Lines
Optional Full-Race Subaru reverse mount intercooler kit and Tial Q-BOV. Includes couplers and clamps.
Note: Currently only available for the 2004-2007 WRX/STI.
Dyno Results!
Pictures and Videos
Application Notes:
Requires the stock STI oil pan (Will not fit with Moroso oilpan or Cosworth oilpan)
some chassis may require a small bend to the aluminum A/C line (most do not)
wrap wire loom as it comes out of firewall with heat wrap and pull with zip ties towards shock tower for additional clearance
HPC coated turbine housing is StrONGLY recommended
HPC coated up pipe, downpipe and lower manifold also recommended
Heat wrap recommended and will not void warranty
The gasket that should be used with our twinscroll lower manifold is the OEM subaru triple layer steel gasket. There are other less expensive options available, but this is the best because it has a built-in crush ring and is steel so it will not deteriorate. The Subaru part number for the exhaust gaskets is PN # 14038 AA 000. Torque properly to factory specifications
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| HPC Downpipe Coating: |
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| HPC Manifold Coating: |
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| HPC Turbine Coating: |
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Full-Race Special Items
.JPG "Gen2 Twinscroll Turbo Kit")
