2015-2021 Subaru Wrx/Sti Rear Diffuser V5 ( Aggressive)
Model: 2015-2021 SUBARU WRX/STI REAR DIFFUSER V5
Fitment: 2015-2021 SUBARU WRX/STI
- - Type: Subaru WRX body kit, STI Body Kit
- - Made from Aerospace Lightweight ALUMINUM no ABS PLASTIC!!!!
- - Made in the USA
- - Comes fully CNC'd and professionally powder coated.
- - Comes pre-drilled
- - Fitment Guaranteed
- - Hardware included
- - Professional install highly recommended
A rear diffuser is an automotive aerodynamic modification typically found mounted on the vehicle’s underbody located at the rear of the car, underneath the rear bumper. As a vehicle is in motion, air flowing in the underbody is typically at high-speed and has low-pressure. The design and purpose of a diffuser are to help reduce drag and to create downforce by facilitating the airflow underneath the vehicle’s underbody. A diffuser is used to increase the air volume along its full length, thus creating a void that must be filled by air. This in turn creates a Venturi effect, meaning the air flow is accelerated at the beginning of the diffuser creating a low pressure, thus creating downforce. As the air travels along the full length of the diffuser, the high-velocity air is eased back into standard velocity matching the ambient speed at the rear of the vehicle reducing overall drag. With the addition of vertical “fins” attached to the diffuser, this helps to optimize the diffusers efficiency by ensuring that all air drawn into the diffuser is from the underbody and not from the upper body surfaces. A diffuser can be further tune-up with the addition of a front splitter to help mediate the underbody’s airflow.
2015-2021 rear diffuser V5 STI
Was great! Since I have an after market exhaust though, was impossible to bolt down part of it. She’s secure but not perfect
Loving the look of my diffuser.
V5 Aggressive Diffuser
Absolutely love the look of it, it’s solid. love how it connects up to the sway bars, give it that much more peace of mind, will be making another purchase very soon!!
it was a good install gave my wrx a aggressive look highly recommend
This Diffuser Definitely adds that aggressive look that I needed! it came with all the brackets but missed two nuts for them though it was easy to go to a hardware store to get those. The sides of the diffuser jut out past the bumper cover a little bit so its no entirely flush with it but the more I look at it, the more I like the look! I get a lot of compliments even just driving down the road. 10 out of 10 great product!