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Replacement Diffusers

Product Image Product Name Price Buy Now
AC Schnitzer Carbon Rear Diffuser BMW Z4 E89 with M Sports Package 09-14 AC Schnitzer Carbon Rear Diffuser BMW Z4 E89 with M Sports Package 09-14  $3,895.00  $3,797.63  Buy Now
AC Schnitzer Carbon Rear Diffuser with Clear Coat BMW M3 Coupe E92 | Cabrio E93 08-13 AC Schnitzer Carbon Rear Diffuser with Clear Coat BMW M3 Coupe E92 | Cabrio E93 08-13  $3,095.00  $3,017.63  Buy Now
AC Schnitzer Carbon Rear Diffuser without Clear Coat BMW M3 Coupe E92 | Cabrio E93 08-13 AC Schnitzer Carbon Rear Diffuser without Clear Coat BMW M3 Coupe E92 | Cabrio E93 08-13  $2,495.00  $2,432.63  Buy Now
AC Schnitzer Rear Diffuser BMW 4-Series 14-15 AC Schnitzer Rear Diffuser BMW 4-Series 14-15  $790.00  $770.25  Buy Now
AC Schnitzer Rear Diffuser BMW 5-Series F10|F11 with M-Technik Aero 11-15 AC Schnitzer Rear Diffuser BMW 5-Series F10|F11 with M-Technik Aero 11-15  $790.00  $770.25  Buy Now
Agency Power "CSL Style" Rear Diffuser BMW E46 M3 01-06 Agency Power "CSL Style" Rear Diffuser BMW E46 M3 01-06  $349.99  Buy Now
Agency Power Aeroform Carbon Fiber Rear Diffuser BMW F82 F80 M4 M3 15-18 Agency Power Aeroform Carbon Fiber Rear Diffuser BMW F82 F80 M4 M3 15-18  $1,195.00  Buy Now
Agency Power Aeroform Carbon Fiber Rear Diffuser Lamborghini Huracan LP-610 15-18 Agency Power Aeroform Carbon Fiber Rear Diffuser Lamborghini Huracan LP-610 15-18  $2,750.00  Buy Now
Agency Power Carbon Fiber Diffuser Panel Ferrari 458 10-15 Agency Power Carbon Fiber Diffuser Panel Ferrari 458 10-15  $1,495.00  Buy Now
Agency Power Carbon Fiber Rear Diffuser Audi B8 A4 S-Line 09-12 Agency Power Carbon Fiber Rear Diffuser Audi B8 A4 S-Line 09-12  $1,350.00  Buy Now
Agency Power Carbon Fiber Rear Diffuser Audi B8 S4 09-12 Agency Power Carbon Fiber Rear Diffuser Audi B8 S4 09-12  $1,350.00  Buy Now
Agency Power Carbon Fiber Rear Diffuser BMW F10 M5 12-17 Agency Power Carbon Fiber Rear Diffuser BMW F10 M5 12-17  $895.00  Buy Now
Agency Power Carbon Fiber Rear Diffuser BMW M2 F87 Agency Power Carbon Fiber Rear Diffuser BMW M2 F87  $1,400.00  Buy Now
Agency Power Carbon Fiber Rear Diffuser Ferrari 458 Agency Power Carbon Fiber Rear Diffuser Ferrari 458  $2,000.00  Buy Now
Agency Power Carbon Fiber Rear Diffuser For M-Tech Bumper BMW 320 | 328 | 330 F30 12-16 Agency Power Carbon Fiber Rear Diffuser For M-Tech Bumper BMW 320 | 328 | 330 F30 12-16  $600.00  $450.00  Buy Now
Agency Power Carbon Fiber Rear Diffuser Lamborghini Gallardo LP-560 08-13 Agency Power Carbon Fiber Rear Diffuser Lamborghini Gallardo LP-560 08-13  $2,800.00  Buy Now
Agency Power Carbon Fiber Rear Diffuser Lamborghini Huracan LP-610 15-18 Agency Power Carbon Fiber Rear Diffuser Lamborghini Huracan LP-610 15-18  $2,495.00  Buy Now
Agency Power Carbon Fiber Rear Diffuser McLaren MP4-12C | 650S Agency Power Carbon Fiber Rear Diffuser McLaren MP4-12C | 650S  $3,000.00  Buy Now
Agency Power Carbon Fiber Rear Diffuser Mercedes C63 Coupe W205 Agency Power Carbon Fiber Rear Diffuser Mercedes C63 Coupe W205  $1,600.00  Buy Now
Agency Power Carbon Fiber Rear Diffuser Mercedes-Benz CLA250 Agency Power Carbon Fiber Rear Diffuser Mercedes-Benz CLA250  $700.00  $525.00  Buy Now
Agency Power Carbon Fiber Rear Diffuser OEM Style SRT Viper 13-17 Agency Power Carbon Fiber Rear Diffuser OEM Style SRT Viper 13-17  $1,200.00  Buy Now
Agency Power Carbon Fiber Rear Diffuser Porsche 991 Turbo Agency Power Carbon Fiber Rear Diffuser Porsche 991 Turbo  $1,000.00  Buy Now
Agency Power Carbon Fiber Strake Diffuser Porsche 997 Turbo 07-13 Agency Power Carbon Fiber Strake Diffuser Porsche 997 Turbo 07-13  $1,000.00  Buy Now
Agency Power Gloss Carbon Fiber DTM Style Rear Diffuser Porsche Macan 95B 15-18 Agency Power Gloss Carbon Fiber DTM Style Rear Diffuser Porsche Macan 95B 15-18  $800.00  Buy Now
Akrapovic Carbon Fiber High Gloss Rear Diffuser Porsche 911 Carrera S | 4 | 4S | GTS 991.2 17-18 Akrapovic Carbon Fiber High Gloss Rear Diffuser Porsche 911 Carrera S | 4 | 4S | GTS 991.2 17-18  $1,534.13  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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