09/18/2026
If you own a tape measure, you can design a diffuser.
Today we launch the 🆕Diffuser Configurator. A free web tool that turns a handful of measurements off your car into a real, manufacturable rear diffuser, built and shipped to your door.
→ Fits any car. With or without bumper cut.
→ Measure it with a tape measure. No scanner, no template.
→ Infinite configurations, guided setup. Change a number, see it update in 3D.
→ Know the weight before you order. Real numbers, not estimates.
→ Free to use. Download your 2D and 3D files whether you buy or not.
→ Fast turnaround, shipped straight to your door.
→ Ships internationally.
Build yours free at diffuserconfig.777performance.com (link in bio)
Measured in 30 minutes. This E36 runs a relocated exhaust, so the shape was built around it. Race spec: the front section bolts to the bottom of the differential and follows the floor line all the way back to the rear bumper.
Adjustable curve profiles. Start flat, then ramp. Bow it out around a bumper. The diffuser bends around obstacles a straight ramp would run right into.
Full configurator on mobile and desktop, plus printable 2D schematics so you can check your dimensions against the actual car before you commit.
The configurator watches your ramp angle, ride height and exit area as you build. Go too aggressive and it tells you. Go too shallow and it tells you that too. You end up inside the window where a diffuser actually does something.
Carbon uprights, quick release hardware, same setup we use on our chassis mounted splitter. Coming as a standalone kit soon. Cut them to length with simple tools, no fab shop.