The SLN Performance Ceramic Coated Sports Cat Downpipes are the perfect solution for S55 owners who want increased performance without the harsh rasp associated with decats. These downpipes free up the restriction of the factory catalytic converters while the Euro 5 200-cell sports cat and ceramic coating help maintain a deep, refined tone and keep engine bay temps lower. Ideal for M2C, M3 and M4 builds running stock or tuned setups.

Fitment: BMW F80 M3, F82/F83 M4, F87 M2 Competition (S55)

Key Features

Euro 5 200-Cell Sports Catalysts

– Reduces restriction vs OEM
– Maintains a smoother, deeper exhaust tone
– Minimises rasp typical of the S55 platform

Ceramic Thermal Coating

– Lowers engine bay temperatures
– Helps reduce intake air temperatures (IAT)
– Improves heat management under sustained load

Performance Engineering

– Noticeable power increase
– Faster turbo spool and sharper throttle response
– Flow-optimised smooth transition design

Premium Construction

– 100% TIG welded
– OEM-spec 304 stainless flanges
– All brackets and mounts replicated from OEM
– LHD/RHD compatible

Benefits

These SLN sports cat downpipes unlock significant performance while maintaining a far more pleasant, refined exhaust tone than decats. Engine bay temps remain more controlled thanks to the ceramic coating, improving longevity and consistency on both road and track.

Fitment

Suitable for:
– BMW F80 M3 (2015–2018)
– BMW F82/F83 M4 (2015–2018)
– BMW F87 M2 Competition (2018+, S55 only)

Installation Notes

– ECU tune required
– Professional installation recommended
– Not MOT legal (motorsport/off-road use only)

About SLN Performance

SLN Performance engineers high-quality stainless steel exhaust components designed for maximum durability, flow and heat resistance. Their ceramic-coated downpipes are highly regarded for improving performance while controlling temperatures on high-output BMW engines.