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ARM S55 Catless DownpipesUpgrade the performance of your M2 Comp, M3, or M4 with a set of ARM Catless Downpipes! 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 powered M4. Our goal for the ARM M4 Downpipes was to provide a solution that would maximize power and torque, fit perfectly, and sound extraordinary.

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Upgrade the performance of your M2 Comp, M3, or M4 with a set of ARM Catless Downpipes!

HIGHLIGHTS

Name: ARM S55 Catless Downpipes
Brand: muk-zwingenberg.de
SKU: 63936615378
Price: 223.50 USD
Availability: InStock
Rating: 4.4248 (2381 reviews)

• 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 powered M4. Our goal for the ARM M4 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 M3, M4, or M2 Comp. owner looking to safely push their S55 engine beyond basic Stage 1 tuning. With Stage 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 S55 Downpipes relieve the 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 F80 downpipes and switching to a Stage 2 flash we made 539whp/544wtq, this is 68whp and a massive 127wtq gain over just the Stage 1 flash!

Even with the Resonated ARM S55 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 S55 will make under part and full throttle.

RUMBLE, NOT RASP.

The ARM Resonated S55 Downpipes give your S55 an unparalleled sound that even other owners will notice. The deep, aggressive tone of the ARM S55 Resonated Downpipes will stand out next to the all too familiar high-pitched rasp 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 S55 downpipes.

CONSTRUCTION

Precision CNC machined v-band flanges offer a smooth transition of exhaust gasses from the the turbochargers to the ARM S55 Downpipes. The body of the 3" ARM M4 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 that bolt up directly to 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 M4 Downpipes are a massive improvement over the OEM S55 downpipes, with precise fitment and brilliant finish the ARM S55 Resonated Downpipes are the perfect solution for your S55 project. Our goal for the S55 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 S55 Resonated Downpipes with a 30 Day Money-Back Guarantee and the ARM Lifetime 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

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

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.