The STI rear diffuser offers the Subaru owner more than just a fantastic profile, it is a one of a kind aftermarket improvement that cuts wind shear, improves aerodynamics and speed, and even improves the overall value of the car. Combined with other WRX STI body kits such as a breathtaking STI canard, the STI rear diffusercan turn any Subaru into a high profile racing machine, a street legal ride that will be the envy of anyone who sees it. When properly installed, our 2004 to 2018 STI rear diffuserscan easily highlight the natural aerodynamic flow of the car and also sets the Subaru apart from other vehicles with its sleek, strong finish. Made of a strong carbon material the STI diffuseris an extremely durable and affordable way to improve the look and performance of your Subaru STI.

The WRX STI rear diffuser literally finishes of the sleekest, sharpest looking Subaru profile that you will ever see anywhere. Lauded as a reputable fast and brash looking enhancement that can be found on the market, the STI diffuser is so unique, you can identify the car by the profile in the dark, even when buried in a sea of other vehicles.

Improve your Subaru with Our STI rear diffusers

When you install WRX STI body kitson your Subaru, you can blend a series of aftermarket improvements that develop a profile all your own. There are plenty of choices to make from the various 2004 - 2018 STI rear diffusers available to you, but it’s important to find the right fit for you and your car. With WRX STI body kits you can affordably transform any Subaru WRX into a sleek looking machine that reflects you and your style, but that looks fast enough to beat any other machine on the road.

Nothing feels better than driving down the road in an eye-fetching ride. The STI rear diffuser will make your Subaru the center of attention, but it will also give you peace of mind, so long as you buy your WRX STI body kits from a trusted premium Subaru dealer like Aeroflow Dynamics.

We Have the Very Best STI Rear Diffuser On The Market

When you buy your STI rear diffuser from Aeroflow Dynamics we 100% guarantee that the STI rear diffuser will fit properly. This will give your Subaru not only the perfect look but also, a look that will last as long as you take care of your car. All WRX STI body kits we sell are American made and come with that fitment guarantee you can bank on. Why spend more for less when you can buy the best, most durable STI rear diffuser from the most trusted source in business today? We deliver quality STI body kitsat the best prices, and we stand behind all our parts with a guarantee as well!