BMW F80 M3 Resonated Equal-Length Midpipe Set – Balanced Dual Exhaust Design for Smoother Flow, Refined Tone & Reduced Drone | Fits F80 M3 Sedan, 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 M3 (F80 Sedan) – 2014 to 2018, including Competition & CS models

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

IMPORTANT NOTE: All exhaust systems are custom fabricated to order. These are not generic third-party exhausts — our team handles each system in-house, and you’ll be able to see the craftsmanship immediately upon unboxing.

While materials are sourced worldwide, all final metalwork, quality assurance testing, and fitment/mounting verification are completed at our facility in Texas, United States.

Because of the extensive labor involved and the high cost/risk of return shipping exhaust systems, full returns are not accepted. However, if there is ever a verified fitment issue, we will 100% stand by our guarantee and, with proper documentation, make sure you are taken care of.

Please note: once an order is placed, if we are not contacted within 24–48 hours of order placement, cancellations cannot be promised.

Each exhaust unit takes approximately 2–3 weeks for full fabrication. Once fabrication is complete and the system is in quality assurance testing, we will send detailed photos of your exhaust for you to review and approve so you feel fully confident before it ships.

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