ARM Catted Downpipes for BMW F80 M3 / F82-F83 M4

Overview

The ARM F8X S55 Catted Downpipes are the ultimate 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!

Downpipes are considered a standard upgrade for any F8X 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 F8X Catted 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 543whp and 547wtq, this is 73whp and 126wtq gain over the stock results!

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.

Details

Highlights

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

Construction

• Smooth transition of exhaust gasses from the the turbochargers to the ARM S55 Catted Downpipes
• Smooth, gradual transition from the 3" inlet to the 2.5" exit for optimum exhaust flow
• Solution that would maximize power/torque, fit perfectly, and sound uniquely extraordinary

What's in the Box

• ARM F8X Catted Downpipes
• CNC Machined Bracket for Front-Turbo Downpipe
• 4x Downpipe to Mid-Pipe Bolts/Nuts
• ARM Lifetime Replacement Warranty

Rumble, Not Rasp.

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.

Warranty & Off-Road Use

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.

Fitment

Watch: Video 1, Video 2