This OEM Subaru part bolts to the factory rear bumper to add a more aggressive style and improve the aerodynamics of the car. The flat bottom, vented top accessory rail can create a better downforce on the car at speeds. This downforce improves traction at high speeds and keeps the car stable.
Like all aerodynamic parts, looks are half the battle. This accessory diffuser changes the rear end styling. The look is subtle, but significant.
Click Here for Install Instructions.
WARNING: Cancer and Reproductive Harm
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