SLN BMW G90 & G99 M5 S68 Ceramic Coated Downpipes 2024+

SLN Performance Ceramic Coated Primary & Secondary Downpipes for BMW G90 and G99 M5

The SLN Performance primary and secondary downpipes for the BMW G90 and G99 M5 are a premium upgrade, engineered specifically for enthusiasts and tuners seeking to maximize the S68 4.4L twin-turbo V8's potential by removing restrictive factory catalysts.

SLN downpipes are crafted from high-grade stainless steel and finished with a professional-grade ceramic coating

This setup dramatically reduces backpressure, delivers quicker turbo spool with reduced lag, sharper throttle response, and a deeper, more aggressive V8 exhaust note. The ceramic coating retains exhaust heat inside the pipes for optimized gas velocity and scavenging, while significantly lowering radiated heat to the engine bay—helping maintain cooler underhood temperatures, protecting nearby components, and enhancing overall engine reliability and durability.

Additional advantages include exceptional corrosion and rust resistance (ideal for long-term ownership), extended component lifespan, a sleek aesthetic that resists discoloration over time, and precise bolt-on fitment at a competitive price.

Main Benefits

• Premium stainless steel construction
• Completely eliminates both primary and secondary catalytic converters
• Substantial reduction in exhaust backpressure
• Faster turbo spool-up, minimized lag, and improved throttle sharpness
• Enhanced exhaust volume and a raw, aggressive V8 sound
• Ceramic coating retains heat for better exhaust gas velocity and scavenging, supporting marginal gains in efficiency and tuning headroom
• Dramatically lowers underhood temperatures, reduces heat soak, and protects sensitive components (sensors, wiring, etc.)
• Superior resistance to corrosion, rust, oxidation, and thermal fatigue for maximum longevity
• Expands tuning potential on the S68 engine
• Backed by a 1-year SLN Performance warranty plus guaranteed proper fitment
• Tailored for seamless, direct-fit installation on G90 sedan and G99 Touring models

Important Legal Notice – Track/Motorsport Use Only These downpipes are intended exclusively for off-road, motorsport, or closed-course use (such as track days or drag strips). Removing the factory catalytic converters violates emissions standards in Europe, the US, and many other regions, and may also exceed legal noise restrictions in some areas. In the UK, a vehicle equipped with these will not pass an MOT inspection.

Installation typically triggers a check engine light and may cause the car to enter limp mode. To operate properly without issues, you'll need ECU coding, an aftermarket tune, or other modifications to address the sensors. SLN Performance strongly recommends restricting use to controlled environments only and not for public road driving.

Fitment Details

• Compatible with BMW G90 M5 (2024 and newer)
• Compatible with BMW G99 M5 Touring (2024 and newer)
• Engine: S68 4.4-litre twin-turbo V8