MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 with Flex Section

We are proud to introduce the MAD S55 Fat Boy 3.5" Downpipes. These are the largest BMW S55 M2/M3/M4 downpipes on the market.

Upgrade from the stock S55 downpipes to the MAD 3.5" S55 catless downpipes for maximum airflow, power, and sound!

Upgrade to the MAD BMW 3.5" S55 downpipes to eliminate the backpressure caused by your stock catalytic converters. By upgrading to our downpipes, your turbos can now spool faster and achieve maximum power. As a bonus, your car will sound a lot nicer as well.

Expect up to a 30HP increase on a tuned BMW S55 with stock turbos, even more on cars with upgraded turbos.

The flex pipe Section will help reduce the stress and unwanted vibration caused by heat and engine Movement. 

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
• Spot on fitment
• Flex section

Fitment:

• 2018+ BMW M2 Competition
• 2014+ BMW M3
• 2015+ BMW M4

SKU:

MAD-004

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.