Active Autowerke BMW M3/M4 (G80/G81/G82/G83) Equal Length Midpipe

BMW actually attempted an equal-length exhaust solution on the G8X from the factory, using a crossover pipe from the short downpipe. But they overcorrected, making the driver's side exhaust longer than the passenger side, leaving the factory system still imbalanced. Active Autowerke's patented Signature Equal Length Midpipe corrects the passenger side exhaust length specifically, giving the G80 M3 and G82 M4 a genuinely true equal-length system and a smoother sound.

This brings the same expertise developed for the F8X M cars to the G8X platform, offered as one of three midpipe choices alongside the Single and X-Pipe versions. Gen 2 introduces specially developed resonators, engineered to remove rasp from the exhaust tone with minimal change in overall volume, alongside a genuine reduction in the "2k buzzing" some owners find annoying and less cold-start rattle from the factory system. The equal-length technology itself is protected by US Patent 11248511 and EU/UK Patent 3882441, genuinely unique engineering rather than a generic aftermarket solution. Constructed from 100% 304 brushed stainless steel with an industry-standard warranty against rust, the system installs with only two cuts needed in the stock midpipe, remaining a bolt-on that most can perform, with the stock midpipe reinstallable if ever needed. It includes the Active G-Brace as standard.

Why Choose This Equal Length Midpipe

• Patented equal-length design (US Patent 11248511, EU/UK Patent 3882441)
• Gen 2 resonators reduce rasp and "2k buzzing" versus the original Gen 1 design
• Corrects BMW's own imperfect factory equal-length attempt
• Includes the Active Autowerke G-Brace as standard
• 100% 304 brushed stainless steel, industry-standard warranty against rust
• Bolt-on installation, only two cuts needed in the stock midpipe
• Fully reversible, stock midpipe can be reinstalled if needed

Compatibility

• BMW G80 M3 Sedan (S58)
• BMW G81 M3 Touring (S58)
• BMW G82 M4 Coupe (S58)
• BMW G83 M4 Cabriolet (S58)