APR Carbon Fiber Rear Diffuser - Fits 02-07 Subaru WRX / STI subaru-wrx-2013 Rotors are treated with a

Rotors are treated with a patented Thermal Stability Process to reduce metal stress which weakens iron over many heating and cooling cycles

Preferred venting solution for serious street tuners and racers

Symmetrical slots and drill holes facilitate the exit of friction dust and gasses

1991 Mazda 323 SE

1986 Maserati Quattroporte Base

APR Carbon Fiber Rear Diffuser - Fits 02-07 Subaru WRX / STI subaru-wrx-2013 Rotors are treated with aDiffusers work in conjunction with other aerodynamic components of a car to help produce downforce. Because a car displaces air as it moves forward, the air molecules in the rear of the car get disrupted causing a vacuum of low pressure air. To help channel the high speed air flow coming from underneath the car, diffusers redirects the high speed air flow to transition smoothly transition into the low pressure vacuum in the rear. This encourages a