HIGHLIGHTS

• Gain up to +43whp / 48wtq
• Improved Turbo Spool
• Enhanced Exhaust Note
• Fully Reversible

PROFILE

ARM Motorsports' new N63/N63TU downpipes for the 4.4L V8 Twin-Turbo powered 650i allows you to take your N63/N63TU engine to the next level. 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 that will shock and awe onlookers!

By replacing the OEM downpipes with the ARM Catless Downpipes, you'll be removing the restriction from the OEM converters which 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 for your 650i.

DYNO PROVEN

Our test car was an N63-equipped 2012 550i GT optioned with the all-wheel drive xDrive system. It came with a Stage 2 tune installed making our baseline numbers 412awhp and 482awtq. After installing the ARM 3" Downpipes and Cold Air Intake we recorded gains of 48whp and 43wtq over the standard Stage 2 tune for an impressive total of 460awhp and 525awtq.

N63 Downpipes F10 550i Dyno

CONSTRUCTION

As with all BMW's, everything is designed to fit in a very compact space, and the N63/N63TU 650i downpipes are no exception. However, BMW did an excellent job of engineering the downpipes to flow in the smoothest path from the turbocharges down to the mid pipe section. Our downpipes essentially followed the same exhaust flow path with a few small modifications to make installation easier. Consequently, the ARM N63/N63TU downpipes mount up to the turbos and midpipes with the same precision as you would expect from the factory 650i downpipes.

n63 downpipes f10 550i exhaust

The ARM N63/N63TU 650i 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 an upper and lower bracket, one being on the section of pipe above the flex joint where it secures to the engine block, and the other on the lower portion below the flex joint where it is secured to the transmission housing. These are the same points BMW designed their factory 650i downpipes to be secured with, which means a strong and lasting connection safe for all the components on the vehicle.

n63 downpipes f10 550i exhaust

The ARM N63/N63TU 650i 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 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 650i motor running smoothly.

SOUND CLIPS

CEL DELETE KIT

The installation of catless downpipes on your N63/N63TU will result in an inevitable check engine light (CEL) as the DME will detect that emissions are not being burnt-up by the OEM catalyst. To remove this CEL without having to tune it out we offer the CEL Delete Kit which is comprised of two O2 sensor spacers specifically calibrated to comply with BMW's parameters for a functioning catalyst. These install into the post-catalyst O2 sensor bungs on each N63 Downpipe, effectively removing the CEL that would otherwise appear.

IN THE BOX

• ARM N63 3" Catless Downpipes
• ARM Crush Brackets
• 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

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.

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01/13/2024

William SVG verified by SHOP

United States

My only dislike is that there was no comment or recommendation for a new gasket kit. Other than that the car sounds like an absolute fucking beast. Love them . My car sounds like a real car.

06/29/2023

Joshua S.

Night And Day

2015 550i m sport had a muffler delete before going catless and it sounded pretty good. Putting on the cats changed everthing the car is a different car it sounds ridiculous!

08/29/2022

Cody P.

Canada

Service

The customer experience is amazing, I live in Canada & they took care to make sure my shipping was right & I even got a discount. Highly recommend

07/30/2022

Anonymous

United Arab Emirates

The quality is so perfect

Be for installing in my f13 650i just I spray it with ceramic coating to reduce the heat and I feel the defrent in sound (turbo spools) and performance Thanks so much ARM motor sport Best regards m.Almajid ��

06/27/2022

Robert J.

Fabrication quality is first class!

I installed the down pipe and charge pipe over the weekend. Way more low end torque. Check photo for O2 sensor installation. Move the sensor out of the air flow and it won't throw a code. Awesome products. Thanks ARM.

BMW 650i N63 / N63TU 3" Catless Downpipes

HIGHLIGHTS

PROFILE

DYNO PROVEN

CONSTRUCTION

SOUND CLIPS

CEL DELETE KIT

IN THE BOX

FITMENT GUIDE

ARM MOTORSPORTS LIFETIME WARRANTY

Recently viewed products

Night And Day

Service

The quality is so perfect

Fabrication quality is first class!

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Currency

BMW 650i N63 / N63TU 3" Catless Downpipes

HIGHLIGHTS

PROFILE

DYNO PROVEN

CONSTRUCTION

SOUND CLIPS

CEL DELETE KIT

IN THE BOX

FITMENT GUIDE

ARM MOTORSPORTS LIFETIME WARRANTY

Recently viewed products

Night And Day

Service

The quality is so perfect

Fabrication quality is first class!

You may also like

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