SLN S63 LCI Midpipe – BMW F90 M5 (2021+)

The SLN Performance Exhaust Midpipes for the BMW F90 M5 LCI 2021+ are engineered as a premium upgrade to unleash the authentic character and performance of the S63 4.4L twin-turbo V8. Precision-crafted from high-quality T304 stainless steel, these midpipes completely replace the restrictive factory Gasoline Particulate Filters (GPFs/OPFs) with smooth, equal-length, free-flowing pipework—eliminating one of the main bottlenecks in the exhaust system.

This direct swap delivers a substantial reduction in backpressure, noticeably quicker throttle response, enhanced engine breathing for better efficiency and tuning potential, and a significantly louder, rawer, more engaging V8 exhaust note that's balanced and refined thanks to the equal-length twin layout. The result is a transformed driving experience with deeper tones, increased presence, and that signature aggressive BMW M soundtrack—without needing a full exhaust replacement.

Built with mandrel-bent tubing and expert TIG welding for optimal flow, strength, and durability, these midpipes offer flawless bolt-on fitment to both OEM and aftermarket rear silencers/axle-back sections, making them an ideal standalone upgrade or complement to other modifications.

Key Benefits

• Premium T304 motorsport-grade stainless steel construction for exceptional strength, corrosion resistance, and longevity.
• Fully removes restrictive GPFs/OPFs, replacing them with equal-length twin pipework for perfectly balanced exhaust tone.
• Dramatic reduction in backpressure for improved engine efficiency and response.
• Sharper throttle feel and enhanced mid-range pull.
• Unleashes a raw, aggressive, and far more immersive V8 exhaust sound.
• Equal-length design ensures symmetrical, refined acoustics that elevate the car's character.
• Seamless compatibility with factory or aftermarket rear exhaust systems.
• Mandrel-bent and TIG-welded construction for smooth flow and reliable durability.
• Boosts tuning headroom on the S63 platform.
• Backed by a 1-year SLN Performance warranty and guaranteed proper fitment.
• Designed for straightforward installation between factory downpipes and rear silencers (approx. 2–3 hours with professional tools)

UK Vehicle Fitment

• Compatible with BMW F90 M5 LCI 2021+
• Engine: S63 4.4-litre twin-turbo V8
• Position: Mid-section (between downpipes and rear silencers)

The use of de-cats, sports cats are for off road/motorsport use only. Using these parts would inhibit your vehicle from passing a MOT test.

Only EC type-approved components are legal and fit for road use.

If non EC type-approved components are fitted at Performance M, the vehicle cannot be driven from our premises on the road, the vehicle will need to be recovered on a trailer to prove your intention is for off road use.