
SLN S63 200 Cell Pre-LCI Sports Cat Downpipes – BMW F90 M5 & F91–F93 M8
SLN S63 200 Cell Pre-LCI Sports Cat Downpipes – BMW F90 M5 & F91–F93 M8 replaces the restrictive factory catalyst section with a higher-flow sports-catalyst arrangement. It is intended to improve exhaust flow and turbo response while retaining a catalytic element and a more controlled exhaust note than a fully catless setup.
Key features
- High-flow 200-cell primary and secondary sports catalysts
- Ceramic-coated stainless-steel construction
- Designed for pre-LCI S63 exhaust layout
- Direct replacement for compatible factory catalyst sections
BMW fitment
F90 M5 & F91–F93 M8.
Road-use / emissions note
A high-flow sports catalyst is not automatically EC type-approved for road use. Suitability and MOT/emissions compliance depend on the exact component and vehicle configuration. Please confirm the approval status before ordering for a road car.
Supply and fitting
Available from Swift Performance with fitment advice before ordering. Workshop fitting can be discussed where the component and vehicle remain suitable for road use.


