R44 BMW F80 M3, F82 M4 & F87 M2 Competition S55 Exhaust 200 Cell Sports Cat Downpipes

The R44 BMW F80 M3, F82 M4 & F87 M2 Competition S55 200 Cell Sports Cat Downpipes are engineered to deliver a strong balance of improved exhaust flow, enhanced sound and controlled refinement for S55-powered M cars. Manufactured from high-quality stainless steel, these downpipes replace the restrictive OEM catalytic converters with high-flow 200 cell sports catalysts, significantly reducing back pressure while retaining more civility than a full catless setup. The result is faster turbo spool, sharper throttle response and a deeper, more purposeful exhaust note, all backed by precise fitment, durability and sensible R44 pricing.Key FeaturesHigh-grade stainless steel constructionHigh-flow 200 cell sports catalytic convertersReduced exhaust back pressure versus OEMFaster turbo spool and improved throttle responseEnhanced exhaust tone without excessive harshnessIncreased tuning potential for the S55 engineSupplied with a 1 year R44 Performance warranty and fitment guaranteeEngineered for accurate fitment on S55-powered M modelsImportant Disclaimer – Motorsport-Use RecommendedWhile these downpipes retain sports catalytic converters, fitment may still breach emissions and noise regulations depending on vehicle specification, tuning level and regional legislation. Vehicles fitted with aftermarket sports cat downpipes may fail a UK MOT test.Installation may trigger an engine management light, and custom coding or aftermarket tuning may be required to ensure correct operation. R44 recommends these downpipes primarily for motorsport-use or closed-course applications and advises customers to check local regulations before installation.CompatibilityBMW F80 M3 (2014–2021)BMW F82 M4 (2014–2021)BMW F87 M2 Competition (2018–2021)Engine: S55 3.0-litre twin-turbo inline-six