HIGHLIGHTS

Up to +30whp / 30wtq
Enhanced Exhaust Note
304 Stainless Steel
Improved Turbo Spool

PROFILE

The ARM S55 Downpipes are the ultimate solution for improving power, throttle response, and exhaust note on your S55.Our goal for the ARM S55 Downpipes was to provide a solution that would maximize power and torque, fit perfectly, and sound extraordinary.

Catless downpipes are considered a standard upgrade for any S55 owner looking to safely push their engine beyond basic Stage 1 tuning. WithStage 2 and up tuning, higher boost increases back-pressure at the OEM catalysts and chokes the S55’s turbochargers, causing them to work harder and shortening their life.
The ARM Downpipesrelievethe stressful back-pressure caused by high-boost tunes, allowing the exhaust to flow freely, increasing power and torque, all while extending the longevity of your S55’s turbochargers. On our test car, after installing our F8X downpipes and switching to a Stage 2 flash we made543whp and 547wtq, this is73whp and 126wtqgain over thestock results!
Even with the Resonated ARM 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 M2 Competition will make under part and full throttle.

RUMBLE, NOT RASP.

The ARM Resonated S55 Downpipes give your F8X an unparalleled sound that even other F87 owners will notice. The deep, aggressive tone of the ARM S55 Downpipes will stand out next to the all too familiarhigh-pitchedrasp of other catless downpipes. Our 4″ resonators are installed in the perfect location to enhance the sound of your S55 without compromising the precise fitment of our F8X downpipes.

Alternatively you can opt for the catted version which replaces the resonators on each downpipe with a 200 cell catalysts to help reduce emissions.

CONSTRUCTION

Precision CNC machined v-band flanges offer asmooth transition of exhaust gasses from the the turbochargers to the ARM S55 Downpipes. The body of the 3″ ARM F87 M2 Competition Downpipes are constructed of SS304 Stainless-Steel and are threaded smoothly and perfectly though the space given by BMW towards the mid-pipe section.
Any downpipes thatbolt up directlyto the OEM mid-pipes must reduce to the 2.5″ to meet the size of the OEM mid-pipes. Some aftermarket downpipes use an abrupt, short reducer which causes turbulence in the exhaust gasses. The ARM S55 Downpipes feature a smooth, gradual transition from the 3″ inlet to the 2.5″ exit for optimum exhaust flow.The ARM S55 Downpipes are a massive improvement over the OEM S55 downpipes, with precise fitment and brilliant finish the ARM S55 Resonated Downpipes are the perfectsolution for your S55 project.Our goal for the ARM Downpipes was to provide a solution that would maximize power/torque, fit perfectly, and sound uniquely extraordinary.We are so confident that you’ll agree we’ve achieved this, we back every set of our ARM Downpipes with a 30 Day Money-Back Guarantee and the ARMLifetime Free-Replacement Warranty.

IN THE BOX

ARM S55 Resonated Downpipes
CNC Machined Bracket for Front-Turbo Downpipe
4x Downpipe to Mid-Pipe Bolts/Nuts
ARM Lifetime Replacement Warranty

FITMENT GUIDE

ARM MOTORSPORTS LIFETIME WARRANTY

Every ARM Motorsports product is backed by a lifetime warranty which is automatically issued at the time of purchase. Your warranty protects you against any defects in craftsmanship or fitment. The warranty entitles you to a replacement unit.

This product is for Off-Road Use Only. Items sold for off-road use only are illegal to use on public roads in most states and provinces. This product is intended for racing vehicles which may never be used on a public road.