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Order Link
https://x-ph.com/arm-motorsports-n55-downpipe-f-series-4-ewg/



This item fits F chassis 1/2/3/4 models with a production date after 07/13


HIGHLIGHTS
• Gain up to 23whp/29wtq
• Faster Turbo Spool
• Improved Exhaust Sound
• Upgrade to Stage 2+ Tuning
• SS304 Stainless Steel

PROFILE

An F30 N55 Downpipe is regarded as the best hardware upgrade to get the most power from your N55 powered F-Series BMW. The stock N55 downpipe comes from the factory with a catalyst that severely restricts exhaust flow. Upgrading your downpipe unlocks the power, improves the turbo spool, allows you to run stage 2+ tuning, and increases the exhaust note of your N55 powered BMW all at once. An N55 downpipe upgrade is the first hardware upgrade every N55 owner should invest in.
CONSTRUCTION

The ARM N55 Catless Downpipe is built with mandrel-bent SS304 stainless steel and backed by the ARM Motorsports Lifetime Warranty. The ARM N55 Downpipe starts with a 4" diameter at the precision CNC machined turbo v-band connection and gradually reduces to a flared joint to optimize exhaust flow while matching up to the stock mid-pipe v-band connection perfectly.

The ARM N55 Downpipe features two O2 sensor bungs to allow for the reinstallation of the OEM oxygen sensors. The O2 sensor bungs are located higher up on the ARM downpipe to avoid stretching the O2 sensor wires during installation. A tune or CEL Delete will be required to avoid a check engine light from displaying on the instrument panel.
FLASHING STAGE 2+

By improving exhaust flow the ARM N55 Downpipe prepares your F-Series BMW for the higher boost tunes. If you already have a software program for your N55 chances are these tune files are already pre-loaded into your software waiting for you to flash after your downpipe installation. Most tunes require an upgraded downpipe and FMIC to run properly, if you don't also have an intercooler upgrade check out our F3X FMIC. Stage 2 N55's can see power around 400whp and 400wtq.



IMPROVED EXHAUST SOUND

In addition to helping your N55 make more power and torque, it significantly improves the exhaust sound. While the downpipe only accounts for approximately 20% of the entire exhaust system, upgrading it will produce a noticeable increase in volume, especially under full throttle and on cold starts. If you're looking for a more extreme sound, you can pair the ARM downpipe will a full exhaust. The ARM N55 downpipe is compatible with any aftermarket exhaust that can connect to the stock N55 downpipe.
IN THE BOX
• ARM N55 Downpipe

FITMENT GUIDE

The ARM F-Series N55 Downpipe is designed to fit the vehicles listed on the chart below with a 4" EWG Turbocharger only.
Make Model Submodel Engine
BMW F30 335i N55 3.0L
BMW F30 335i xDrive N55 3.0L
BMW F32 435i N55 3.0L
BMW F33 435i N55 3.0L
BMW F34 335i xDrive N55 3.0L
BMW F36 435i N55 3.0L
BMW F87 M2 N55 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.

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