BMW F10 550i N63 Downpipes (2-Bolt Flange)

These ARM N63 Downpipes with the 2-bolt midpipe flange take your 4.4L twin-turbo V8 550i to the next level. Built from full 304 stainless steel with 3" construction, they deliver a significant increase in power and torque over the OEM catted downpipes — and open up an incredible exhaust sound. Removing the OEM converters cuts back-pressure so the turbos spool faster and power climbs across the rev range.

Highlights

• Gains of up to +43 whp / 48 wtq.
• Improved turbo spool and an enhanced exhaust note.
• Fully reversible.

Dyno proven

On an N63-equipped 2012 550i GT xDrive with a Stage 2 tune (baseline 412 awhp / 482 awtq), the ARM 3" downpipes plus cold air intake added 48 whp and 43 wtq — for a total of 460 awhp / 525 awtq.

Construction

Full 304 stainless, 3" construction following the OEM flow path for factory-precise fitment. A flex section plus a lower crush bracket (secured to the transmission housing) relieve turbo stress, and two O2 bungs per downpipe retain factory O2 placement, the upper heat shield and correct DME data.

Fitment (N63 4.4L, 2-bolt OEM downpipe only)

BMW F01/F02 750i & 750Li, F07 550i, F10 550i (incl. xDrive).

What's included: ARM N63 3" downpipes, crush brackets, hardware kit.

Backed by ARM Motorsports' lifetime warranty against defects in craftsmanship and fitment.

Emissions disclaimer: This product is intended for off-road, race, or closed-course competition use only and is not legal for use on pollution-controlled vehicles operated on public roads in most states and provinces. You are responsible for compliance with all applicable emissions laws. Please check your local laws before purchase and installation.

Ships from our Vancouver shop — KORE SPEED is proudly Canadian-owned, with no surprise cross-border duties for Canadian buyers. Questions on fitment? Email support@korespeed.com.