Milltek BMW M3 M4 F80 F82 F83 Large Bore Downpipe

Upgrade the exhaust system of your BMW M3 F80 / BMW M4 F82 / BMW M4 F83 with the Milltek Large Bore Downpipe with GPF/OPF & Catalyst Deletes, developed for enthusiasts seeking increased exhaust flow, a more aggressive exhaust character and a stronger performance-oriented driving experience.

The Large Bore Downpipe reduces restriction in the exhaust system by replacing the factory catalytic and GPF/OPF components with a freer-flowing configuration. This allows the 3.0L S55 Twin-Turbo Inline-Six to deliver a more pronounced and aggressive exhaust note, with greater volume and sharper character under acceleration.

The less-restricted exhaust configuration can also complement ECU tuning and other performance modifications, allowing the engine and turbochargers to operate with a more performance-focused exhaust setup. For modified BMW M3 F80, BMW M4 F82 and BMW M4 F83 builds, it provides a clear step toward a more motorsport-inspired exhaust character.

Designed for performance applications, the Milltek Large Bore Downpipe is suited to enthusiasts building a more aggressive S55 Performance setup for track-focused or off-road use. Catalyst and GPF/OPF removal may affect emissions compliance and road legality depending on local regulations.