F90 RSS

The BMW M5 F90 is the most potent iteration of BMW's legendary super sedan, powered by the S63B44T4 — a 4.4-litre twin-turbocharged V8 producing 600 HP in standard trim and 625 HP in Competition spec. With boost levels held conservatively from the factory and a robust bottom-end forged rotating assembly, the S63 in the F90 is one of the most rewarding platforms in the BMW M lineup to tune. Stage 1 ECU calibration alone pushes past 700 HP, while full-build Stage 3 configurations regularly exceed 1,000 HP on pump fuel. This guide breaks down every tuning stage, the hardware each...

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 S63 engine family is one of the most capable twin-turbo V8 platforms ever built. From the F10 M5 to the F90 M5 Competition, and from the M6 Grand Coupé to the X5M and X6M, the S63 in its various iterations has powered BMW's most powerful models for over a decade. Upgrading the factory downpipes is the single most effective bolt-on modification across the entire S63 lineup.This guide covers catless downpipe options for every S63-powered BMW, real-world power gains, exhaust sound changes, fitment across all models, and why an ECU calibration is essential.The S63 Engine Family — Platform OverviewThe...

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...

BMW M5 F90 Competition tuning guide. YPG Race Chip for 740 HP plug-and-play power. Catless downpipes for Stage 2 builds to 800 HP. S63TU 4.4L V8. GCC-optimized calibrations. Free worldwide shipping.