Exterior Components› Body Panels and Components
STILLEN
Rear Diffuser
SKU: KB11222MB
Easy — 1–2 hours
Description
The diffuser features an aerodynamic, race-car inspired design that enhances the rear end appearance of the Q50. It includes oversized exhaust cutouts to accentuate the exhaust system and offers the strength to withstand daily street use. Installation is straightforward with pre-installed 3M automotive tape and requires no cutting or modification to the bumper.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | STILLEN |
| Part Number | KB11222MB |
| Category | Exterior Components |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy