The RVNG 4.5" True Single Valved Quad-Tip Exhaust is the first of its kind for the G80 M3 and G82 M4 — engineered for unmatched flow, sound, and presence. At its heart is a massive 4.5" mandrel-bent 304 stainless steel main section, the largest-diameter exhaust available for this chassis. By keeping a true single path front to back, it eliminates the turbulence and restriction of factory and dual-pipe aftermarket systems, for faster turbo response, maximum exhaust velocity, and a raw, aggressive note that stands apart.

Open the valve and gases take the unrestricted 4.5" path for the loudest, most aggressive tone possible. Close it and flow is redirected through a quieter route for comfortable, drone-free cruising. The system uses a single valve — the second is simply tucked and zip-tied away, with no codes or issues from running one valve. It finishes with quad RVNG signature perforated tips that blend OEM-inspired styling with motorsport performance.

Features

• First and only 4.5" true single exhaust for the G80 / G82 platform
• Full valved system for on-demand sound control
• Horsepower and torque gains when paired with a tune
• Mandrel-bent, TIG-welded 304 stainless steel
• Smooth, uninterrupted bends for maximum flow
• Signature RVNG quad perforated tips (multiple finishes available)
• Works with OEM or aftermarket midpipes

Fitment

• 2021+ BMW G80 M3
• 2021+ BMW G82 M4

Backed by the RVNG RaceWorks lifetime warranty against defects 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.