BMW F82/F83 M4 Resonated Equal-Length Midpipe Set – Balanced Dual Exhaust Design for Smoother Flow, Refined Tone & Reduced Drone | Fits F82 Coupe, F83 Convertible M4, Competition & CS with S55 Engine (2014–2018)

Unlock a smoother, deeper, and more refined sound from your S55 with the BAVMODS® Resonated Equal-Length Midpipe Set — precision-engineered to balance exhaust flow, eliminate rasp, and reduce cabin drone without compromising performance.

From the factory, the F80 M3’s dual exhaust banks are uneven in length, creating unbalanced pressure waves that cause harsh tones, rasp, and unwanted vibration. The BAVMODS® Equal-Length Midpipe corrects that imbalance through a perfectly matched dual-path layout — ensuring both sides of the S55 breathe in harmony for a cleaner, more aggressive tone under throttle.

Engineered for Sound & Flow Precision

Crafted from high-grade T304 stainless steel, each section is mandrel-bent and TIG-welded for flawless internal smoothness and long-term durability. Integrated dual resonators help absorb high-frequency rasp and minimize drone, refining the tone while keeping that signature M-car aggression intact.

The equal-length geometry also promotes consistent exhaust scavenging, improving low-end torque response and smoothing out turbo spool characteristics — perfect for both tuned and stock applications.

Key Features & Benefits

• True Equal-Length Design – Balances exhaust pulses across both banks for a smoother, more refined tone.
• Dual Resonators – Reduces rasp and eliminates mid-range drone for a clean, aggressive sound.
• Mandrel-Bent T304 Stainless Construction – Ensures unrestricted flow and corrosion resistance.
• Improved Flow Dynamics – Enhances scavenging and maintains consistent backpressure for improved throttle response.
• OEM+ Fitment – Direct bolt-on design compatible with stock or aftermarket downpipes and rear sections.
• Aggressive Yet Controlled Tone – Deep, exotic sound at high RPMs with no harsh resonance inside the cabin.

Included Components

• Dual equal-length resonated midpipe sections (left and right)
• Factory-positioned mounting flanges and bracket

Performance & Sound You Can Feel

The BAVMODS® Resonated Equal-Length Midpipe delivers the perfect balance between performance flow and acoustic refinement — transforming the factory F80 exhaust note into a rich, high-pitched growl that intensifies with every RPM.

Expect smoother tone transitions, reduced rasp, and a truly balanced exhaust character worthy of the M badge.

Your S55 deserves to sound as good as it performs.

FITMENT: BMW M4 – F82 Coupe / F83 Convertible (2014–2018) including BMW M4 Coupe (F82) – 2014 to 2018, BMW M4 Convertible (F83) – 2014 to 2018, BMW M4 Competition (F82/F83) – 2016 to 2018, BMW M4 CS (F82) – 2018.

ENGINE COMPATIBILITY: S55B30T0 – 3.0L Twin-Turbo Inline-6

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