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There is no other company that makes high quality, power producing, and purposeful products like Agency Power. With an amazing exhaust system, it only makes sense for Agency Power to offer their up-pipe to Subaru WRX and STI owners. This up-pipe is made from 321 high grade stainless steel. Completely polished, the up-pipe uses 1/2 inch thick flanges for maximum strength connecting to your factory or Agency Power aftermarket header. The AP up-pipe includes a new gasket and bolts to connect to the header. The top side of the up-pipe connecting to the turbo includes new exhaust studs for a secure fit to the factory or aftermarket turbo. They recommend purchasing an OEM gasket when installing. The all TIG welded up-pipe includes a bung for your factory or aftermarket EGT gauge.
The up-pipe is designed to replace the catalytic converter in the WRX and increase air velocity in the STI which has no cat. By replacing the up-pipe, you gain faster turbo spool, quicker throttle response, and an increase of almost 10 wheel horsepower.