Exhaust› Exhaust Pipes, Systems and Components
Roush
ROUSH 2015-2017 Ford Mustang 5.0L V8 Quad Tip Active-Ready Exhaust Kit (Requires 421926)
SKU: R00I 421921
Moderate — 2–4 hours
Description
Part #: 421921
Give your 2015-2017 Mustang GT that ROUSH Performance Look, higher performance and race-inspired exhaust note. The 2015-2017 ROUSH Quad Tip exhaust is an axle back kit with high flow dual tip mufflers, corrosion resistant T-304 stainless steel and high flow mandrel bends. Dual wall chrome flashed tips are a perfect fit with the 2015-2017 ROUSH Mustang Rear Valance. This kit can be easily upgraded to an Active Exhaust with ROUSH Performance's Active Exhaust Module a simple bolt-on process that requires no cutting to the exhaust.This exhaust kit will only fit 2015, 2016, and 2017 Mustang GTs. This exhaust system requires the addition of the 2015-2017 Mustang ROUSH Rear Valance, which comes in two different configurations: Prepped For Backup Sensors part #421919 Not Prepped For Backup Sensors part #421894Check your local noise ordinances for legality.
Quad Tip Exhaust Kit for V8 2015 ROUSH Mustang
MIA's Description
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 | Roush |
| Part Number | R00I 421921 |
Videos
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