Product Details
About this part
MAD BMW F90 M5 F92 M8 Catted Primary Downpipes S63R
Free Shipping
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)
Disclaimer:
For off-road or racing use only. Please check your local laws and regulations before installation.
Fitment
Not sure it fits? Contact us with your car's year, model and VIN and we'll help you confirm before you order.
If a part doesn't fit as expected, contact us and we'll work with you to resolve it.
Majority of products have a fitment section in the product description or within the title.
Returns
- Unused, uninstalled parts can be returned or exchanged within 30 days of the order date.
- To start a return: Contact us first, don't use Return to Sender.
- Returns can have up to a 20% restocking fee.
- Built-to-order and special-order items can't be returned or cancelled once production begins.
Shipping
- Orders are processed 7 days a week to ensure your product ships as quickly as possible.
- Inspect parts within 10 days of delivery, and reach out regarding any damage or missing pieces.
See our Tariff Policy
Warranty
- All parts retain the manufacturer's warranty.
- Warranty claims are subject to the manufacturer's approval.