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The Perrin header drastically improves on the factory unit, producing smooth and balanced exhaust flow from the head to the turbo. This gives you the best of both worlds, with increased turbo response and more torque and horsepower through the whole power band. Instantly increase Turbo Response and add 15-20 whp and 20ftlbs of torque with the Perrin Equal length headers. This header uses properly sized tubing that matches the Subaru exhaust port size as well as turbo inlet ports. This header will work with the factory turbo as well as most aftermarket options and can even be ported if necessary to accommodate a larger turbo.
This header does not require an ECU Tune
Fits all 2015-2021 Subaru WRX.
