R44 BMW F80 M3, F82 M4 & F87 M2 Competition S55 Exhaust Catless Downpipes

The R44 BMW F80 M3, F82 M4 & F87 M2 Competition S55 Exhaust Catless Downpipes are engineered to unlock the full sound and performance potential of BMW’s S55 twin-turbo engine. Manufactured from high-quality stainless steel, this new-design stepped 3.5″–3.0″ configuration replaces the highly restrictive OEM catalytic converters, dramatically reducing exhaust back pressure. The result is faster turbo spool, sharper throttle response and a far more aggressive exhaust note, all delivered with precise fitment, proven durability and a sensible price point.Key FeaturesHigh-grade stainless steel constructionCatless / decat design for maximum exhaust flowNew-design stepped 3.5″–3.0″ pipe diameterSignificant reduction in exhaust back pressureFaster turbo spool and reduced turbo lagSharper throttle responseSubstantial increase in exhaust volume and presenceRaises the tuning potential of the S55 engineSupplied with a 1 year R44 Performance warranty and fitment guaranteeEngineered for accurate fitment on S55-powered M modelsImportant Disclaimer – Motorsport-Use OnlyThese downpipes are strictly for motorsport-use only. Removal of the OEM catalytic converters breaches European and international emissions regulations and may exceed permitted noise limits in certain countries. Vehicles fitted with these downpipes will fail a UK MOT test.Fitting catless downpipes will trigger an engine management light and may place the vehicle into limp mode. Custom coding or aftermarket tuning is required to operate these downpipes correctly. R44 strongly advises use limited to closed-course environments such as track or drag strip applications only.CompatibilityBMW F80 M3 (2014–2019)BMW F82 M4 (2014–2021)BMW F87 M2 Competition (2018–2021)Engine: S55 3.0-litre twin-turbo inline-six