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home > ARM Motorsports N63 / N63TU 3" Catted Downpipes - BMW 550i / 650i / 750i (Incl. xDrive; F0x / F10) 2009-2023 > ARM Motorsports N63 / N63TU 3" Catted Downpipes - BMW 550i / 650i / 750i (Incl. xDrive; F0x / F10) 2009-2023

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ARM Motorsports N63 / N63TU 3" Catted Downpipes - BMW 550i / 650i / 750i (Incl. xDrive; F0x / F10) 2009-2023HIGHLIGHTS Gain up to +43whp 48wtq Improved Turbo Spool Aggressive Exhaust Note 200 Cell Sport Catalysts Direct Bolt On, Fully Reversible PROFILE ARM Motorsports new N63 N63TU Catted Downpipes for the 4. 4L V8 Twin Turbo powered 550i allows you to take your N63 N63TU engine to the next level. The ARM N63 Catted Downpipes feature high flow 200 cell ceramic sport catalytic converters positioned in the OEM location. Made with full 304 Stainless Steel and

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HIGHLIGHTS

Name: ARM Motorsports N63 / N63TU 3" Catted Downpipes - BMW 550i / 650i / 750i (Incl. xDrive; F0x / F10) 2009-2023
Brand: loriwymancasting
SKU: 33459904261
Price: 348.50 USD
Availability: InStock
Rating: 4.333 (1570 reviews)

• Gain up to +43whp / 48wtq
• Improved Turbo Spool
• Aggressive Exhaust Note
• 200 Cell Sport Catalysts
• Direct Bolt-On, Fully Reversible

PROFILE

ARM Motorsports new N63/N63TU Catted Downpipes for the 4.4L V8 Twin-Turbo powered 550i allows you to take your N63/N63TU engine to the next level. The ARM N63 Catted Downpipes feature high-flow 200 cell ceramic sport catalytic converters positioned in the OEM location.

Made with full 304 Stainless Steel and 3" construction these downpipes provide a significant increase in power and torque over the OEM catted downpipes. In addition to the massive power gains, these downpipes open up an incredible exhaust sound from the turbocharged V8!

By replacing the OEM downpipes with the ARM N63 Catted Downpipes, you'll be removing the restriction from the OEM converters. This will reduce exhaust back-pressure and allow the exhaust from the turbochargers to flow more freely. This increase in exhaust flow allows for the turbos to spool faster, increasing power and torque throughout the RPM range of your N63.

DYNO PROVEN

Tested on an N63-powered 2012 550i GT xDrive with a Stage 2 tune, the addition of ARM’s 3" Downpipes and Cold Air Intake yielded +48whp and +43wtq, raising output to 460awhp and 525awtq. The catted version maintains nearly identical gains compared to the catless setup, while offering the benefits of a catted exhaust system.

CONSTRUCTION

Like all BMW performance components, precision fitment is critical. The ARM N63 Catted Downpipes are engineered to follow the smoothest possible exhaust flow path while easing installation. Consequently, the ARM N63/N63TU downpipes mount up to the turbos and midpipes with the same precision as you would expect from the factory 550i downpipes.

The ARM N63 Catted Downpipes come with a flex section to relieve stress between the upper and lower portion of the downpipe from engine movement during aggressive driving. To further reduce any tension on the turbochargers, we have developed a lower bracket, on the lower portion below the flex joint where it is secured to the transmission housing. This is the same point BMW designed their factory N63 downpipes to be secured, which means a strong and lasting connection safe for all the components on the vehicle.

N63 Downpipes F10 550i Exhaust

The ARM N63 Catted Downpipes utilize two O2 sensor bungs on each downpipe to allow for reinstalling the O2 sensors in their factory locations. This not only allows for the accommodation of the upper factory heat shield, but also allows the correct O2 sensor data to be sent to the DME. This is essential for the DME to properly monitor the parameters in the exhaust that are critical to having your N63 running smoothly.

IN THE BOX

• 2x ARM N63 3" Catted Downpipes
• 2x ARM Crush Brackets
• 1x Hardware Kit

FITMENT GUIDE

The ARM N63/TU Catless Downpipes are compatible with the cars on the list below that have a slip-fit style OEM downpipe only. The most reliable and accurate way is to simply look under your vehicle for the connection point between the downpipe and mid pipe. In most cases, this is visible without having to remove any undertrays or covers. If your connections look like the images below and your car is listed on the fitment chart, these will fit your vehicle.

Make	Chassis	Model	Engine
BMW	F01	750i	N63/TU 4.4L
BMW	F01	750i xDrive	N63/TU 4.4L
BMW	F01	Alpina B7	N63/TU 4.4L
BMW	F02	750Li	N63/TU 4.4L
BMW	F02	750Li xDrive	N63/TU 4.4L
BMW	F06	650i	N63/TU 4.4L
BMW	F06	650i xDrive	N63/TU 4.4L
BMW	F06	Alpina B6 xDrive	N63/TU 4.4L
BMW	F07	550i	N63/TU 4.4L
BMW	F07	550i xDrive	N63/TU 4.4L
BMW	F10	550i	N63/TU 4.4L
BMW	F10	550i xDrive	N63/TU 4.4L
BMW	F12	650i	N63/TU 4.4L
BMW	F12	650iX	N63/TU 4.4L
BMW	F13	650i	N63/TU 4.4L
BMW	F13	650iX	N63/TU 4.4L
BMW	G30	M550i	N63R 4.4L
BMW	G30	M550i xDrive	N63R 4.4L
BMW	G05	X5 xDrive50i	N63R 4.4L
BMW	G05	X5 M50i	N63R 4.4L
BMW	G11	750i / xDrive	N63R 4.4L
BMW	G12	750i / xDrive	N63R 4.4L
BMW	G14	850i / xDrive	N63R 4.4L
BMW	G15	850i / xDrive	N63R 4.4L
BMW	G16	850i / xDrive	N63R 4.4L
BMW	G06	X6 M50i	N63R 4.4L
BMW	G07	X7 M50i	N63R 4.4L

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.