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Replacement Diffusers

Product Image Product Name Price Buy Now
Alpil Rear Diffuser FRP Volkwagen GTI MK7 Alpil Rear Diffuser FRP Volkwagen GTI MK7  $614.22  Buy Now
Alpil Rear Diffuser w/Exhaust Tip Audi A6 15-17 Alpil Rear Diffuser w/Exhaust Tip Audi A6 15-17  $1,445.22  Buy Now
Alpil Rear Diffuser w/Exhaust Tip Audi A6 Avant 15-17 Alpil Rear Diffuser w/Exhaust Tip Audi A6 Avant 15-17  $1,445.22  Buy Now
Alpil Rear Diffuser w/Exhaust Tip Audi S6 15-17 Alpil Rear Diffuser w/Exhaust Tip Audi S6 15-17  $1,445.22  Buy Now
Alpil Rear Diffuser w/Exhaust Tip Audi S6 Avant 15-17 Alpil Rear Diffuser w/Exhaust Tip Audi S6 Avant 15-17  $1,445.22  Buy Now
Alpil RSR Carbon Rear Side Diffuser Audi R8 06-14 Alpil RSR Carbon Rear Side Diffuser Audi R8 06-14  $2,464.00  $2,439.36  Buy Now
Alpil RSR FRP Rear Side Diffuser Audi R8 06-14 Alpil RSR FRP Rear Side Diffuser Audi R8 06-14  $1,584.00  $1,568.16  Buy Now
Amuse Carbon Front Under Diffuser Nissan 350Z 03-08 Amuse Carbon Front Under Diffuser Nissan 350Z 03-08  $1,442.01  Buy Now
Anderson Composites Carbon Fiber Rear Diffuser Chevrolet Corvette C7 Stingray | Z06 14-15 Anderson Composites Carbon Fiber Rear Diffuser Chevrolet Corvette C7 Stingray | Z06 14-15  $1,499.00  $1,349.10  Buy Now
Anderson Composites Carbon Fiber Rear Diffuser Ford Mustang | Shelby GT500 13-14 Anderson Composites Carbon Fiber Rear Diffuser Ford Mustang | Shelby GT500 13-14  $629.00  $566.10  Buy Now
Anderson Composites Carbon Fiber Rear Diffuser OEM-Style Chevrolet Corvette C6 2005-2013 Anderson Composites Carbon Fiber Rear Diffuser OEM-Style Chevrolet Corvette C6 2005-2013  $859.00  $773.10  Buy Now
Anderson Composites Carbon Fiber Rear Diffuser Type-AR Ford Mustang 15-18 Anderson Composites Carbon Fiber Rear Diffuser Type-AR Ford Mustang 15-18  $829.00  $746.10  Buy Now
Anderson Composites Carbon Fiber Type-AR Rear Diffuser Ford Focus RS 16-17 Anderson Composites Carbon Fiber Type-AR Rear Diffuser Ford Focus RS 16-17  $899.00  $809.10  Buy Now
APR Carbon Fiber Rear Diffuser Chevrolet Corvette C6 ALL w/Coilover Suspension 05-13 APR Carbon Fiber Rear Diffuser Chevrolet Corvette C6 ALL w/Coilover Suspension 05-13  $1,780.00  $1,513.00  Buy Now
APR Carbon Fiber Rear Diffuser Chevrolet Corvette C6 Z06 w Leaf Springs 06-13 APR Carbon Fiber Rear Diffuser Chevrolet Corvette C6 Z06 w Leaf Springs 06-13  $1,780.00  $1,513.00  Buy Now
APR Carbon Fiber Rear Diffuser Ford Mustang 05-09 APR Carbon Fiber Rear Diffuser Ford Mustang 05-09  $811.00  $689.35  Buy Now
APR Carbon Fiber Rear Diffuser Ford Mustang GT 10-12 APR Carbon Fiber Rear Diffuser Ford Mustang GT 10-12  $832.00  $707.20  Buy Now
APR Carbon Fiber Rear Diffuser Honda S2000 00-03 APR Carbon Fiber Rear Diffuser Honda S2000 00-03  $811.00  $689.35  Buy Now
APR Carbon Fiber Rear Diffuser Honda S2000 AP2 04-09 APR Carbon Fiber Rear Diffuser Honda S2000 AP2 04-09  $811.00  $689.35  Buy Now
APR Carbon Fiber Rear Diffuser Mitsubishi EVO VIII IX 03-07 APR Carbon Fiber Rear Diffuser Mitsubishi EVO VIII IX 03-07  $919.00  $781.15  Buy Now
APR Carbon Fiber Rear Diffuser Subaru WRX STI 02-07 APR Carbon Fiber Rear Diffuser Subaru WRX STI 02-07  $825.00  $701.25  Buy Now
APR Carbon Fiber Rear EVIL-R Wide Body Diffuser Mitsubishi EVO VIII IX 03-07 APR Carbon Fiber Rear EVIL-R Wide Body Diffuser Mitsubishi EVO VIII IX 03-07  $982.00  $834.70  Buy Now
APR Carbon Fiber SS GT Wide Body Rear Diffuser Subaru WRX STI 04-07 APR Carbon Fiber SS GT Wide Body Rear Diffuser Subaru WRX STI 04-07  $825.00  $701.25  Buy Now
APR Fiber Glass Rear Diffuser Dodge Viper Convertible Only 03-10 APR Fiber Glass Rear Diffuser Dodge Viper Convertible Only 03-10  $1,570.00  $1,334.50  Buy Now
APR Fiber Glass Rear Diffuser Ford Mustang GT 05-09 APR Fiber Glass Rear Diffuser Ford Mustang GT 05-09  $574.00  $487.90  Buy Now
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In automotive terms, a diffuser is a shaped section of the car’s underbody, which improves the vehicle’s aerodynamic properties. This happens by enhancing the transition between the high-velocity airflow underneath the car and the freestream airflow of the ambient atmosphere. In simpler terms, the purpose of a rear diffuser is to reduce air turbulence as your car drives at high speeds.

By decreasing drag, rear diffusers make your car more stable at high speeds and reduce the amount of wind resistance it must overcome. Less wind resistance means that your vehicle will be able to utilize its existing horsepower and torque more efficiently. A rear diffuser also adds style to your car and helps it stand out from the crowd. If you have a rear wing on your car, it also affects the diffuser. When the rear wing is mounted low and close to the diffuser, the low pressure under the wing helps suck air through the diffuser.

As the front of a vehicle slows down the air without a diffuser, this is the ideal place to install an inlet. A splitter is commonly used and serves to increase the amount of downforce (lift inverted) at the front of the car. The airstream is brought to stagnation above the splitter by an air dam, which results in an area of high pressure. Below the splitter, the air is redirected away from the stagnation zone and accelerated, causing the pressure to drop. The decrease in pressure in combination with the high pressure over the splitter area creates downforce. Consequently, the larger the area of the splitter, the more downforce is generated.

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