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The Perrin Performance Equal Length Subaru 02-09 WRX & 04-09 STi Header has quickly become one of the most popular Subaru aftermarket header choices due to proven power gains of up to 30 wheel horsepower and 30lbs of torque on a slightly modified STi! The Perrin manifold is a true equal-length WRX & STi header constructed of 304SS.
The Perrin Performance WRX & STi header is designed to make large power gains without sacrificing low-end power. Flanged for a stock uppipe, the Perrin header is compatible with stock-location uppipes, including those included with rotated-mount turbo kits, making the Perrin manifold an excellent choice for big-turbo Subarus.
The Perrin Performance equal-length header is designed for the 2.5 liter 04-09 STi, 2006-09 WRX, and 05-08 Legacy GT, but it will fit the 02-05 WRX with the purchase of a 2.5L oil pan. If you are looking for huge power gains, this is the header for you.
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Part Number: PSP-EXT-050
nice piece
by: Dan
Like everything from Perrin, this is a nice looking piece. i'm using it with an HTA68 turbo and grimmspeed EWG setup. once tuned, it actually feels more responsive than the stock (stage 2); setup. It'll change the 'boxer rumble', but that's perfectly fine for the power and drivability gains seen with this setup. AWESOME street car.