2009 Nissan GTR
"We did a total of 20 runs, 13 of which were over 200 MPH at the Texas Mile in our Nissan GTR. The diffuser felt extremely solid and kept the car firmly planted on the ground at speeds well over 200 MPH. Our front splitter cracked at 217 MPH and flew under the car. The Difflow diffuser's sharp fins chopped that splitter up as we ran over it. I'm was very impressed at how well the diffuser held up over and over again! Thanks Difflow for helping us achieve the 2nd fastest speed in the world with our GTR." - Jeremey, SouthSide Performance, Houston TX.
2011 Lotus Evora
"I think this is the best looking diffuser you can find in the market. Thanks glenn your product is amazing quality and great built. Easiest install i have ever done. If anybody is looking for a diffuser I can vouch for this product. The quality is top notch. I think this diffuser totally complements the rest of the upgrades I have. I absolutely Love the way it looks." - Ramtin, Irvine CA.
View More Testimonials


What's so Special about our Diffusers?
Our diffusers are designed to improve the overall performance and look of your car. Most of our diffusers don't require drilling or cutting. Just bolt the diffuser on or replace your OEM diffuser.

Increased Stability at High Speeds.
Our diffusers have a long body and long fins. A long body helps keep the air under the car, as opposed to swirling up behind the rear of the car. The long fins help channel the air properly under the car from front to back, as opposed to having the air scattered underneath the car. Check out our Demonstration Video.

Less Drag Means Faster Lap Times.
The fins on our diffusers are vertically angled to 90° degrees to prevent ''air spill.'' The long fins keep the air channeled smoothly underneath the car so it doesn't flow in any direction except front-to-back. When you have the air flow under control, you'll get less drag in return. Less drag means a higher top speed, better stability and an increase in gas mileage.

Why can't I just get a Carbon Fiber Diffuser?
Usually the diffuser sits right up next to the exhaust system on a car. Some carbon fiber finishes can come off easily. Our aluminum diffusers with a black powdercoat won't warp or discolor like carbon fiber. Our diffusers can also handle harsh scratches and scrapes from the pavement. Carbon Fiber diffusers can crack and they are expensive to replace. Why spend all the money on a fancy looking carbon fiber diffuser when 75% of it is hidden underneath the car anyway?

Quality Workmanship and Finish.
We design, plasma-cut, assemble, powdercoat and manage our operations from Missoula, Montana USA! Quality products with professional customer service or your money back.

Check out what people are saying about our diffusers!
Different Colors and Tastes... Our Diffusers on Customer Cars!
We ship all over the world! Contact us for a shipping quote!



Difflow Diffusers, as seen in EVO magazine!