SLN BMW F90 M5 & F91 F92 F93 M8 Pre-LCI 200 CEL Ceramic Sports Cat Downpipes

SLN Performance Ceramic Coated 200-Cell Catted Primary & Secondary Downpipes for BMW F90 M5 & F91 F92 F93 M8 Pre-LCI 2018-2020

The SLN Performance 200-cell catted primary and secondary downpipes for the BMW F90 M5 & F91 F92 F93 M8 Pre-LCI offer a high-performance upgrade for enthusiasts and tuners who want serious gains from the S63 4.4L twin-turbo V8 without going fully catless. Built from premium stainless steel and enhanced with SLN's professional-grade ceramic coating, these downpipes replace the factory primary and secondary catalytic converters with high-flow 200-cell metallic sports cats—delivering near-unrestricted exhaust flow while maintaining essential emissions scrubbing and a more street-usable profile.

This configuration significantly lowers backpressure compared to stock, providing rapid turbo spool, greatly reduced lag, crisp throttle response, and a bold, enhanced V8 exhaust note that's aggressive yet more refined (without the raw rasp or strong fuel smell often associated with full decat setups). The ceramic coating elevates the experience by retaining heat in the pipes for superior exhaust gas velocity and scavenging efficiency, while slashing radiated heat to the engine bay—resulting in cooler under hood conditions, better protection for components like sensors and wiring, and improved long-term engine reliability.

Extra perks include top-tier resistance to corrosion, rust, and thermal degradation, a durable, non-discoloring finish, and precise bolt-on fitment—all backed by strong value and SLN's quality focus.

Main Benefits

• Premium stainless steel construction with full professional ceramic coating for outstanding heat retention, management, durability, and premium aesthetics
• Equipped with high-flow 200-cell metallic sports catalytic converters for maximized flow with reduced emissions impact
• Major drop in exhaust backpressure vs. factory setup
• Quicker turbo spool, minimal lag, and sharper throttle feel
• Deeper, more aggressive V8 sound with better refinement and reduced exhaust odor
• Excellent corrosion, rust, oxidation, and heat-fatigue resistance for extended lifespan
• Unlocks substantial tuning headroom on the S63 engine while offering a more balanced street/track compromise
• Comes with a 1-year SLN Performance warranty and guaranteed perfect fitment
• Designed for easy, direct bolt-on installation on F90 M5 & F91 F92 F93 M8 Pre-LCI models

Important Legal Notice – Off-Road / Motorsport Use Recommended These 200-cell catted downpipes are high-flow performance parts and may still not fully comply with strict emissions standards in Europe, the US, or other regions. They could potentially trigger a check engine light, affect emissions tests, or exceed noise limits depending on jurisdiction. In the UK, passing an MOT is not guaranteed and often requires additional coding or tuning.

Installation may activate a CEL or limp mode due to altered catalyst monitoring—ECU coding, aftermarket tuning, or O2 sensor adjustments are typically needed for smooth operation. SLN Performance recommends these primarily for track, closed-course, or off-road use, and advises against unrestricted public road driving where emissions compliance is required. Always check local laws.

Fitment Details

• Compatible with BMW F90 M5 Pre-LCI 2018-2020
• Compatible with BMW F91 F92 F93 M8 Pre-LCI 2018-2020
• Engine: S63 4.4-litre twin-turbo V8