BMW G82/G83 M4 Single-Flow Exhaust Midpipe – Merged Single-Pipe Design for Reduced Restriction & Deeper Exhaust Tone (2021+)

Unleash a deeper, smoother, and more refined tone from your S58-powered BMW G82/G83 M4 with the BAVMODS® Single-Flow Midpipe — a performance-engineered solution designed to enhance exhaust flow, eliminate rasp, and reduce unwanted drone while maintaining daily-drive comfort.

From the factory, the G8X’s dual midpipe design creates uneven exhaust pulses and excess backpressure, contributing to a sharp, raspy tone. The BAVMODS® Single-Flow Midpipe merges both exhaust banks into a single large-diameter pipe, allowing exhaust gases to flow more freely. The result is a cleaner, deeper, and more aggressive sound profile with smoother tone transitions and improved throttle response.

Engineered for Flow & Sound Precision

Crafted from high-grade T304 stainless steel, this midpipe is mandrel-bent and TIG-welded for optimal flow and long-term durability. The merged single-pipe design reduces restriction and enhances exhaust scavenging, improving both low-end torque and top-end flow.

This configuration creates a more unified exhaust tone, eliminating high-frequency rasp while retaining that signature BMW aggression — a true OEM+ sound upgrade that complements both stock and tuned setups.

Key Features & Benefits

• Single-Flow Merged Design – Reduces restriction and unifies exhaust flow for a smoother tone.
• Deeper, Cleaner Sound – Eliminates rasp and harsh resonance for a refined, aggressive note.
• Mandrel-Bent T304 Stainless Construction – Corrosion-resistant, free-flowing, and built to last.
• Improved Exhaust Scavenging – Enhances throttle response and turbo spool characteristics.
• OEM+ Fitment – Direct bolt-on design compatible with stock or aftermarket downpipes and rear sections.
• Balanced Acoustic Character – Aggressive under throttle, controlled at cruising speeds.

The BAVMODS® Single-Flow Midpipe transforms your G80/G81’s exhaust note into a deep, smooth, and harmonized tone, reducing rasp and creating a more refined, motorsport-inspired sound. Expect subtle performance gains, cleaner exhaust flow, and a tone that complements the S58 engine’s raw power without overwhelming daily comfort.

FITMENT: BMW M4 Coupe (G82), M4 Convertible (G83) — including Competition, CS & xDrive models (2021+)

ENGINE COMPATIBILITY: S58B30T0 – 3.0L Twin-Turbo Inline-6

Please refer to the “Fitment” section in the product description for compatibility details.