Unlock the true sound and performance of your BMW F9X M5 or M8 with the MAD Catted Downpipes, now with a No CEL Guarantee.

Upgrade your restrictive stock downpipes to the MAD high-flow catted design and experience significant improvements in exhaust flow, turbo spool, and throttle response. Built from premium 304 stainless steel, these downpipes are engineered to handle extreme heat and deliver long-lasting durability.

With 300 cell high-flow catalytic converters, you get the perfect balance of performance and drivability. Expect a deeper, more aggressive exhaust note with quicker turbo response, all while avoiding check engine lights. If a CEL does occur due to the catalytic converter, MAD will replace the downpipes for free.

These downpipes are designed as a direct bolt-on upgrade with spot-on fitment, no cutting or welding required. They work seamlessly with the stock exhaust system as well as aftermarket setups.

No CEL guarantee
If you get a check engine light related to the catalytic converter, MAD will replace the downpipe for free.

Don’t settle for stock performance. Upgrade to the MAD 300 Cell Race Catted Downpipes and experience the full potential of your BMW.

Warranty coverage

• The "No CEL" guarantee is valid for only one year from the date of purchase.

• The lifetime warranty still applies in cases of manufacturer defects, such as cracks in the pipe or welds.

Race use only

Features

• 300 CEL catalytic converters

• No check engine light guarantee

• Compatible with right-hand drive and left-hand drive vehicles

• Smooth bends for maximum airflow without drone

• Up to 30HP increase on stock turbos, even more with upgraded setups

• Lifetime warranty on defects and fitment

• 90-day return period

• Ships in 1 to 2 business days

• Spot-on fitment

• Flex section for added durability

Fitment:

2018+ BMW F90 M5 (incl. Competition)
2018+ BMW F91/F92/F93 M8 (Coupe, Convertible, Gran Coupe)
SKU: MAD-122

Disclaimer:
For off-road or racing use only. Please check your local laws and regulations before installation.