Presenting the all-new MAD F90 M5 FATBOY Primary Downpipes – our most expansive offering to date! Crafted for unrivaled performance, these cutting-edge downpipes are meticulously engineered with a singular objective: to accommodate the most substantial piping diameter achievable between the flanges. Objective successfully achieved!

Crafted from premium-quality T304 stainless steel, these downpipes are built to last. They are mandrel-bent for maximum flow and feature smooth, non-restrictive transitions that minimize turbulence and improve exhaust gas flow. The result is a noticeable increase in power and torque, along with a more aggressive exhaust note that will turn heads on the street and at the track.

Installation is easy and straightforward, with no cutting or welding required. The MAD F90 M5 Primary Downpipes are designed to bolt directly onto your BMW F90 M5's factory exhaust system, and they come complete with all necessary hardware and gaskets for a hassle-free installation.

So if you're looking to take your BMW F90 M5 to the next level, the MAD F90 M5 Primary Downpipes are the perfect upgrade. Don't settle for a stock exhaust system – unleash the full potential of your engine with these high-performance downpipes.

Features:

• Compatible with right-hand drive and left-hand drive vehicles
• Smooth bends for maximum airflow without any drone
• Up to 30HP increase on the stock turbos, even more on upgraded turbos
• Lifetime warranty on defects and fitment
• All orders ship in 1-2 business days
• Spot on fitment
• Flex section

Fitment:

• 2018+ BMW F90 M5
• 2019+ BMW F92 M8

Note for Euro 2021+ LCI Vehicles:
Before ordering, please check which downpipe style your vehicle has. Our MAD downpipes do fit vehicles equipped with OPF filters, but it's important to confirm fitment.

Please ensure your current downpipes have a V-band slip style connection, not a flange/2-bolt design. This will help ensure proper compatibility.

 

Emissions Disclaimer:
This product is not legal for sale or use on pollution-controlled vehicles operated on public roads, highways, or streets. It is intended for off-road, race, or closed-course competition use only, where such modifications are permitted.

By purchasing this product, you acknowledge and agree that:

• You are responsible for compliance with all applicable emissions laws and regulations.

• MAD and its affiliates disclaim any liability for improper or unlawful use of this product.

• Use of this part on public roads may violate the Federal Clean Air Act (42 U.S.C. § 7522) and similar state laws.

Please check your local laws before purchase and installation.