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The ARM F8X S55 Catted Downpipes are the solution for improving power, throttle response, and exhaust note on your S55 powered F8X. Our goal for the ARM F8X Catted Downpipes was to provide a solution that would maximize power and torque, fit perfectly, and sound extraordinary. The ARM S55 Catted downpipes incorporate two 200 cell catalysts to reduce emissions and exhaust odor while providing superior exhaust flow for your F8X! Even with the ARM F8X Catted Downpipes installed on your stock-tune S55, you will notice an increase in power, torque and responsiveness. Not to mention the incredible, head-turning sounds your M3 will make under part and full throttle.
The ARM S55 Catted Downpipes give your F8X an unparalleled sound that even other F8X owners will notice. The deep, aggressive tone of the ARM F8X Catted Downpipes will stand out next to the all too familiar high-pitched rasp of other downpipes.

Precision CNC machined v-band flanges offer a smooth transition of exhaust gasses from the the turbochargers to the ARM S55 Catted Downpipes. The ARM F8X Catted Downpipes feature a smooth, gradual transition from the 3" inlet to the 2.5" exit for optimum exhaust flow. The ARM F8X Catted Downpipes are a improvement over the OEM S55 downpipes, with precise fitment and brilliant finish the ARM S55 Catted Downpipes are the solution for your S55 project.
| Make | Model | Submodel | Engine |
|---|---|---|---|
| BMW | F80 | M3 | S55 3.0L |
| BMW | F82 | M4 | S55 3.0L |
| BMW | F83 | M4 | S55 3.0L |
| BMW | F87 | M2 Competition | S55 3.0L |
Backed by the ARM Motorsports Lifetime Warranty against defects in craftsmanship or fitment. See the full terms for details.
Off-road use only: This product is intended for racing vehicles and may be illegal for use on public roads in many states or provinces.