MAD BMW F9x M5 M8 Catted Downpipes W/ No CEL Guarantee MAD-122

Unleash the full potential of your BMW F9X M5 or M8 with the MAD 300 Cell High-Flow Catted Downpipes, designed for maximum performance with the No CEL Guarantee. These precision-engineered downpipes replace your restrictive factory units with a free-flowing design that delivers significant gains in horsepower, torque, and turbo response—while maintaining everyday drivability.

Constructed from premium 304 stainless steel, the MAD catted downpipes are built to withstand extreme heat and ensure long-lasting durability. Featuring 300 cell high-flow catalytic converters, they strike the perfect balance between performance and compliance, offering a deeper, more aggressive exhaust tone without excessive drone.

With smooth mandrel bends and spot-on OEM-style fitment, installation is a direct bolt-on—no cutting, no welding, no hassle. These downpipes work flawlessly with both stock and aftermarket exhaust systems.

No CEL Guarantee:
MAD stands by its engineering. If you get a check engine light related to the catalytic converter within the first year, MAD will replace your downpipes for free.

Performance Benefits:

• Gain up to +30HP on stock turbos, with even more power on upgraded setups

• Quicker turbo spool and sharper throttle response

• Deeper, sportier exhaust note for an authentic M experience

• Race-use only design with added flex section for durability

Features:

• 300 Cell High-Flow Catalytic Converters

• Premium 304 Stainless Steel Construction

• No CEL Guarantee (2 years coverage)

• Lifetime Warranty on Manufacturer Defects

• Compatible with LHD & RHD Models

• Direct Bolt-On Installation

• Ships in 1–2 Business Days

Fitment:

• 2018+ BMW F90 M5 (incl. Competition)

• 2018+ BMW F91 M8 Convertible

• 2018+ BMW F92 M8 Coupe

• 2018+ BMW F93 M8 Gran Coupe

SKU: MAD-122

Disclaimer: For off-road or racing use only. Check local emissions laws before installation.