Active Autowerke Valved Rear Box / Axle-Back Exhaust for BMW M2 Competition & M2 CS (F87 LCI 2018+, S55) – 304 Stainless Steel, OE Valve Compatible – Performance / Sports Backbox, Rear Muffler, Silencer Upgrade – Bolt-On Rear Section – Part 11-067

Active Autowerke Valved Rear Section for BMW F87 M2C and M2 CS

Unlock a richer soundtrack and premium build quality with the Active Autowerke valved rear silencer, part number 11-067. Designed for the BMW M2 Competition F87 LCI and BMW M2 CS, this rear box replaces the restrictive factory backbox to deliver a deep, motorsport-inspired tone with seamless control through the original electronic flap motors. If you want a quality rear section for your S55-powered coupe that sounds refined in the week and purposeful at the weekend, this is the upgrade.

Why enthusiasts choose this rear box upgrade

This system transforms the character of the car without sacrificing everyday manners. With the valves shut you get a calm, civilised cruise. Open the flaps and you unleash a fuller, throatier note that suits spirited driving. It is a free-flowing, precision-built stainless solution that preserves factory integration while giving your F87 the voice it deserves.

Highlights

• Direct replacement rear section for BMW F87 LCI M2 Competition and M2 CS
• Uses the OE electronic valve actuators for factory driving mode control
• Constructed from 304 grade stainless steel for longevity and corrosion resistance
• Deeper idle, pronounced growl under load, refined when cruising
• Made in the USA with precise fitment checks on an in-house F87 fixture
• Supplied with the required installation hardware

Compatibility

• BMW M2 Competition F87 LCI 2018 onwards
• BMW M2 CS F87

Sound you will enjoy every drive

Expect a fuller, more engaging exhaust note that complements the S55 engine without overwhelming the cabin. Cold starts have presence, part-throttle is mature, and wide-open throttle delivers an assertive bark. For an even more pronounced tone, pair this rear section with an Active Autowerke mid pipe solution to create a cohesive, performance-focused system front to back.

Our hands-on experience

We have fitted this system on customer cars and the feedback has been consistently positive. Owners love the factory-style valve control, the quality of the welds and materials, the spot-on alignment, and most of all the balanced sound character. It looks right, fits right, and sounds fantastic.

Installation and fitting

This is a straightforward bolt-on rear section with the included hardware. For professional fitting, contact MJ Modifications in Warwickshire for a quote at info@mjmodifications.co.uk. We can supply and install for a hassle-free upgrade.

Technical details

• Manufacturer: Active Autowerke
• Material: 304 stainless steel
• Valve control: reuses factory electronic actuators
• Configuration: valved rear section axle-back
• Part number: 11-067

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