The Perrin 08-09 WRX rotated mount turbocharger kit are one of the most comprehensive and best-designed on the market. The Perrin rotated mount turbo kit utilizes redesigned exhaust and intake plumbing to install a large Garrett Turbocharger on your WRX or STi, without being limited by the stock under-the-manifold turbo inlet and internal wastegate. Perrin's rotated turbo placement allows for straight, unobstructed intake plumbing and fitment of even the biggest turbochargers, like the Garrett GT40R!

Rotated Mount Uppipe & Downpipe:Constructed from mandrel bent 304 stainless steel with .500" CNC-cut flanges, the Perrin rotated mount uppipe and downpipe are both tig-welded to the highest quality standards. The Perrin rotated mount uppipe features 2in diameter piping, and is flanged for an v-band Tial 44mm external wastegate for precise boost control. The Perrin roated mount uppipe will bolt to a stock exhaust manifold, or aftermarket header designed for a factory 2-bolt uppipe; we suggest the Perrin equal-length exhaust header for optimal performance.

Rotated Mount Cold Air Intake:Recently added to the Perrin WRX & STi rotated-mount turbo kit is the 3in cold air intake system. Designed to draw cold air from the fenderwell directly into the Garrett turbocharger, without any restriction from a MAF sensor, Perrin's new cold air intake will ensure optimal airflow and increased power. In addition, the Perrin cold air intake system has all the necessary fittings for the crankcase vents, valve cover breathers, and emissions control hoses for direct installation. The Perrin WRX & STi rotated mount cold air intake eliminates the MAF sensor housing for optimal flow and minimal turbulence. Because of the removal of the MAF housing from the intake tract, the Perrin turbo kit requires that you switch to a blow-through MAF type system (where the MAF sensor is placed in the intercooler piping), or convert to a full speed density system, eliminating the MAF sensor entirely. Perrin makes a blow-through intercooler pipe (sold separately) to make this conversion a simple process that will make your Subaru perform better and run more smoothly with a big turbo.

Tial 44mm V-Band External Wastegate w/ 14psi Spring:For precise boost control, the Perrin WRX & STi Garrett turbo kits use a Tial 44mm wastegate. The Tial 44mm Wastegate uses v-band connections to eliminate leaks and allow for installation in tight spaces (like the WRX & STi engine bay). The 44mm design releases exhaust gases faster, yielding spot-on boost control, and the valves are constructed from temperature resistant materials for excellent heat-handling characteristings. Loaded w/ a 14psi spring, this wastegate can be pulled up to around 28psi with a conventional boost controller or solenoid. If you need to go higher than that, an off-the-shelf Tial spring is available for almost any pressure requirement.

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