Open Monday - Friday 8am to 6pm MST Order Online 24/7
0 Items | $0.00 | Checkout | My Account
Vivid Racing Home Page
972x50 Holiday Sale
**New Products**CLEARANCE DEALSAir IntakesBig Brake KitsBrake PartsBody | Aero KitsECU TuningElectronicsEngine InternalsEngine UpgradesExhaust PartsExteriorFuel ComponentsGaugesInteriorOEM PartsGenuine PorscheGenuine SubaruPower PackagesPulleysRacing GearRadiator PartsRoll Bars | CagesSuspensionTransmissionTurbo | SuperchargerWheelsTiresWheel AccessoriesUniversal & RepairUTV | PowersportsVivid Racing Gear

Browse by Brand

Help & Information

About Us Service & Tuning Our Guarantees Financing Coupon Offers International Orders Price Matching Affiliate Program Customer Gallery Tuning Articles Product Reviews Privacy Policy Shipping & Returns Terms & Conditions Employment
Vivid Racing Wholesale
Own a Shop?
B2B Click Here
Coupons
Save Big!
View Coupons Here
Military Discounts
Military Discounts
We Salute You!

Social Media

Facebook Instagram YouTube Google+ Twitter LinkedIn Snapchat Tumblr Flickr Vimeo Pinterest Yelp

Why Buy at VR

Matt Acacio says:The AP headers are great! Shipmen-t was quick and packaged really well. It took me about six hours to intall the headers and fitment was spot on. I didn't run into any issues pertaining to the initia ..
5 of 5 Stars!

Patrick says:I just got my order in today and am very happy with my purchase. You guys gave me a good service and you have a great team. Very good price on my rims. I will recommend you guys to all my friends and ..
5 of 5 Stars!

Matthew Kovac says:Outstanding piece! I love mine and it adds a great touch to my keychain. I absolutely love carbon fiber and the keychain piece itself is really tough. Get one while you can! ..
5 of 5 Stars!

03 Wrx wagon says:Very fast shipping! Expected a few weeks but it showed up in a few days! Fit perfect, once painted it will be even better! ..
5 of 5 Stars!


Contact Us
  HomeDiffusers

Replacement Diffusers

Vivid Racing carries high quality replacement diffusers to fit your car or truck at great prices. Diffusers are available in different materials such as carbon fiber, urethane or fiberglass. Brands include Agency Power, 3D Design, APR Performance, Akrapovic, Vertex, C-West, Fairy Design, and many more!


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.

Buy online or call us today to place your order! If you don't see what you're looking for, please contact us at 1-480-966-3040. We can help you find the right product for your vehicle to fit both your taste and your needs. 



Online Payment Service
Acura NSX Parts
Acura RSX Parts
Audi R8 Parts
Audi A4 Quattro Parts
BMW 335i Parts
BMW M3 M4 Parts
Cadillac CTS Parts
Chevrolet Camaro Parts
Chevrolet Corvette Parts
Chevrolet Tahoe Parts
Dodge Challenger Parts
Dodge Ram 2500 Parts
Ferrari 355 Parts
Ferrari 599 Parts
Fiat Abarth Parts
Ford Raptor Parts
Ford Focus ST Parts
Ford Mustang Parts
GMC 1500 Parts
Honda CR-Z Parts
Honda S2000 Parts
Hyundai Veloster Parts
Infiniti G35 Parts
Infiniti Q50 Parts
Jaguar XF Parts
Jeep Wrangler Parts
Kia Optima Parts
Lamborghini Gallardo Parts
Lamborghini Aventador Parts
Lexus IS350 Parts
Lexus RC-F Parts
Lincoln MKZ Parts
Lotus Elise Parts
Maserati GranTurismo Parts
Mazda RX-8 Parts
Mazda Miata Parts
McLaren 650 Parts
Mercedes AMG Parts
Mercedes CLS Parts
Mercedes C-Class Parts
Mitsubishi EVO Parts
Mini Cooper S Parts
Mini Clubman Parts
Mitsubishi Evolution Parts
Mitsubishi Lancer Parts
Nissan 240SX S13 Parts
Nissan 370Z Parts
Nissan GTR Parts
Porsche 991 Parts
Porsche 996 TT Parts
Porsche Boxster Parts
Range Rover Sport Parts
Range Rover Evoque Parts
Saab 9-2 Parts
Scion xB Parts
Scion FRS Parts
Smart Car Parts
Subaru Forester Parts
Subaru WRX STI Parts
Subaru BRZ Parts
Tesla Model S Parts
Toyota MR2 Parts
Toyota Supra Parts
Volkswagen GTI MK6 Parts
Volkswagen Beetle Parts
Volvo S40 Parts