Active Autowerke BMW F80 M3 & F82 M4 Exhaust Mid-Pipe – Non-Resonated, Single 3.5in Oval Centre Section | F8X Midpipe Upgrade

Active Autowerke F80 F82 S55 Centre Pipe - Non-res, Single 3.5 inch Oval Middle Section

Transform the soundtrack and responsiveness of your S55-powered BMW with this non-res centre pipe from Active Autowerke. If you want a deeper tone, reduced rasp and stronger mid-range punch on your F80 M3 or F82 M4, this straight-through 3.5 inch oval middle section is the upgrade enthusiasts in the UK keep searching for. It replaces the restrictive factory middle section to improve gas velocity, cut back pressure and deliver a more purposeful M-car note without the tinny high-pitched character many owners dislike.

Active Autowerke has been building proven BMW performance solutions for decades. This single-oval centre section maintains excellent ground clearance while flowing significantly better than the OE twin-tube layout. Expect sharper throttle response, quicker turbo spool and a richer, more cohesive exhaust tone on your M3 or M4.

Reasons to choose this centre section

• Documented wheel horsepower and torque gains on the dyno when paired with the matching rear section*
• Deeper, smoother exhaust note with reduced rasp and drone
• Straight-through 3.5 inch oval design for maximum flow and excellent clearance
• Improved low to mid-range pull and faster turbo response
• Lighter than the factory BMW middle section
• Direct-fit upgrade engineered specifically for the BMW F80 M3 and F82 M4
• Non-resonated centre pipe that effectively acts as a resonator delete

Real-world results

Independent Mustang Dyno testing with the Active Autowerke centre section combined with the Active Autowerke rear system shows clear improvements:

• Stock: 380 whp | 371 wtq
• Full Active Autowerke cat-back: 398 whp | 401 wtq
• Full Active Autowerke cat-back run 2: 397 whp | 398 wtq

*Peak improvements of 18+ whp and 30+ lb-ft reported with the complete Active Autowerke cat-back configuration. Figures will vary with vehicle condition and supporting hardware.

Note: The complete exhaust system is recommended for off-road or track use in certain regions. Please check local regulations.

How it elevates sound and flow

The stock F8X middle section uses multiple chambers and a small crossover that introduce restriction and accentuate an out-of-sync turbo tone. Active Autowerke’s single 3.5 inch oval pipe streamlines exhaust pulses for a cleaner, deeper voice while reducing back pressure for measurable performance gains. The oval profile preserves under-car clearance, ideal for lowered cars and fast road or track-day use.

Compatibility

• BMW F80 M3
• BMW F82 M4

Prefer a more muted sound? A resonated version is available separately.

Why buy from MJ Modifications

We have installed this Active Autowerke centre section on customer S55 cars and the feedback is excellent. Customers love the deeper tone, the way it tidies up the S55 character and the noticeable improvement in response. It is a highly effective M3 M4 exhaust middle section upgrade that delivers real-world benefits.

Installation and support

Professional fitting recommended. MJ Modifications offers installation at our Warwickshire workshop. To request a fitting quote or book your car in, email info@mjmodifications.co.uk.

Part number

11-037/NR

Media

Helpful search terms

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All performance data provided by the manufacturer or from testing with listed components. Actual results may vary. Always ensure compliance with local laws before use on public roads.