The SLN Performance Ceramic Coated Decat Downpipes offer the highest-flow option for S55-powered models. Designed for maximum performance, these 3.5”–3” downpipes eliminate the restriction of the OEM catalysts, delivering huge gains in spool, throttle response and overall power. The ceramic coating ensures lower engine bay temperatures for improved consistency on road and track.

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

Key Features

Largest-Bore S55 Downpipes (3.5”→3”)

– Maximum exhaust flow
– Sharpest turbo response possible
– Designed for high-power builds

Ceramic Thermal Coating

– Reduces radiant heat
– Helps maintain stable IAT
– Protects surrounding components

Performance Advantages

– Significant horsepower gains
– Faster spool and more mid-range torque
– Smooth transition design for optimal flow

High-Quality Construction

– 100% TIG welded
– OEM-spec 304 stainless flanges
– LHD/RHD compatible
– Fully bolt-on fitment

Benefits

These decats provide the strongest performance improvement for the S55 platform. Expect much quicker turbo response, higher power potential and reduced under-bonnet heat thanks to the ceramic coating.

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
– Not MOT legal (motorsport/off-road use only)
– Professional fitting recommended

About SLN Performance

SLN Performance specialises in premium exhaust systems designed for maximum flow, performance and durability. Their ceramic-coated decat downpipes are built for demanding S55 applications.