The ARM S58 Crossover Pipe replaces the restrictive OEM crossover with a fully round design that improves exhaust flow. Where the OEM piece uses a flow-killing oval shape, the ARM crossover stays round to eliminate turbulence and constraints — increasing exhaust flow on your G80/G82/G83 BMW.

Highlights

• Exotic exhaust sound — removes OEM casting material and sound deadening.
• Precision laser-cut flanges.
• Fits OEM and upgraded midpipes.
• SS304 stainless steel, 4 lbs lighter than OEM.

Construction

Fully round SS304 construction, starting at the left downpipe with an OEM-style 2-bolt flange and crossing the underbody to the driver-side midpipe connection, with a flange sized to seat the midpipe gasket perfectly. Designed to work with ARM S58 downpipes and midpipes, and compatible with OEM or upgraded units using OEM-style connections.

Fitment (S58 3.0L)

BMW G80 M3, G82 M4, G83 M4 (incl. Competition xDrive), G87 M2.

What's included: ARM S58 crossover pipe, 2x mounting bolts/nuts.

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.