M5 Competition RSS

The BMW M5 F90 is one of the most capable super sedans ever built — a 4.4-liter twin-turbo V8 producing 600 HP in standard form and 617 HP in Competition trim. But the factory exhaust system doesn't match the car's potential. It's heavy, over-muffled, and tuned to meet global noise regulations rather than deliver the sound a twin-turbo V8 deserves. If you're looking for the best exhaust upgrade for the F90 M5, this guide covers everything: titanium vs stainless steel, valvetronic vs straight pipe, weight savings, and which system is right for your driving style. Why Upgrade the F90 M5...

The BMW F90 M5 uses the S63B44T4 — a 4.4-litre twin-turbo V8 that produces 591–617 HP from the factory depending on variant. It is one of the most potent sedans ever built, and it has substantial untapped potential locked behind factory exhaust restrictions. The stock catalytic converters downstream of each turbocharger are the primary bottleneck, and replacing them with performance downpipes is the foundation of any serious M5 build. Why the S63 Needs Downpipes The S63 positions its two twin-scroll turbochargers outboard of the cylinder banks in a traditional hot-outside-vee layout. Each turbo feeds exhaust through its own catalytic converter...