Active Autowerke BMW G87 M2 Signature Equal Length Midpipe

Transform the sound and character of your BMW with the Active Autowerke Signature Equal Length Midpipe for the G87 M2, engineered to deliver a smoother, more refined exhaust tone while restoring the true sound expected from the S58 platform. Featuring patented equal length technology and newly developed Gen 2 resonator design, this system corrects factory exhaust imbalances and enhances both sound quality and overall driving experience.

Key Features:

• Patented equal length midpipe design (US Patent 11248511)
• Gen 2 advanced resonators to reduce rasp and unwanted frequencies
• Constructed from 100% 304 stainless steel
• Smoother, more refined high-rev exhaust tone
• Reduces “2k RPM buzz” and cold start rattle
• Designed to improve exhaust flow and sound character
• Compatible with factory-style exhaust systems
• Includes Active Autowerke G87 chassis brace
• Factory-style flanges and clamps for secure fitment
• Backed by manufacturer warranty against corrosion

True Equal Length Sound Engineering

BMW’s factory exhaust system partially attempts an equal length configuration but results in an imbalance between the left and right exhaust paths. Active Autowerke’s patented design corrects this by properly equalising both sides, delivering:

• A smoother, more consistent exhaust note
• Improved tonal balance across the rev range
• A more authentic BMW M sound profile

Gen 2 Resonator Technology

The updated Gen 2 midpipe introduces specially engineered resonators designed to:

• Reduce harsh rasp commonly associated with S58 setups
• Minimise unwanted “2k RPM buzzing”
• Improve cold start sound refinement
• Maintain volume while enhancing tone quality

For optimal results, the resonated version is recommended for vehicles running upgraded downpipes.

Premium Stainless Steel Construction

Manufactured from high-grade 304 stainless steel, this midpipe ensures:

• Long-term durability and corrosion resistance
• Consistent performance under high temperatures
• High-quality finish and structural integrity

Designed for Seamless Integration

This system is designed to work with factory-style exhaust configurations and many aftermarket systems using OEM-style connections. Installation requires minimal modification, with only two cuts needed to the original midpipe, allowing for a reversible upgrade if required.

What’s Included?

• Active Autowerke Equal Length Midpipe (Gen 2)
• Integrated resonator system (depending on version)
• Active Autowerke G87 chassis brace
• Installation hardware and clamps

Compatibility

• BMW G87 M2 (S58 Engine)

Important Information

• Designed for compatibility with factory-style exhaust systems
• Results may vary with non-compatible aftermarket exhaust setups
• Recommended to pair with matching Active Autowerke components for best results
• Installation requires cutting of the OEM midpipe
• For off-road use only

Why Choose Active Autowerke?

Active Autowerke is globally recognised for developing innovative BMW exhaust solutions, with patented technologies that enhance sound quality, performance and driving experience.

Why Buy from R44 Performance?

R44 Performance supplies premium BMW performance upgrades trusted by enthusiasts worldwide.

• BMW performance specialists
• Expert advice and product support
• Fast UK and international shipping
• Carefully selected performance brands

Upgrade your BMW with the Active Autowerke G87 M2 Equal Length Midpipe, delivering refined sound, improved balance and a more engaging driving experience.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

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