SLN BMW S55 M3 M4 Equal Length Mid Pipe with Under-Brace

The SLN Performance Equal Length Mid Pipe for the BMW M3 and M4 transforms the characteristic raspy S55 exhaust note into a smoother, deeper and more refined tone. Built for the F80/F82/F83 platform, this equal-length system is the ultimate solution to the factory sound issues while also improving turbo response and reducing system weight.

Fitment: BMW F80 M3 / F82 M4 / F83 M4

Key Features

Equal-Length Pipework

– Removes the uneven, buzzy factory tone
– Produces a smoother and more exotic exhaust note
– Significantly improves sound quality

Extended Under-Brace

– Reinforced chassis support
– Allows ideal pipe routing
– Improves long-term stability

Performance Enhancements

– Faster turbo spool
– Stronger low-end and mid-range response
– Lighter than the OEM mid section

Benefits

The SLN equal-length mid pipe unlocks the true potential of the S55 engine note, delivering a far cleaner, richer and more refined sound. Performance also improves with better exhaust flow and enhanced throttle response.

Fitment

Suitable for:
– BMW F80 M3 (2014–2019)
– BMW F82/F83 M4 (2014–2019)
– BMW M4 GTS

Installation Notes

– Professional installation recommended
– Compatible with stock or aftermarket rear sections
– Not MOT legal if combined with decats

About SLN Performance

SLN Performance develops high-quality exhaust upgrades engineered for improved tone, flow and reliability. Their equal-length S55 systems are widely regarded as one of the best sound solutions for F8X owners.