MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD Exhaust MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section
MAD

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

$332.10
$369.00 Sale $332.10
Quality Content
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Description Fitment Reviews

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
  • 90 day return period
  • All orders ship in 1-2 business days
  • Spot on fitment
  • Flex section
Quality Content

We try to keep all the products that are listed our site in stock, with short lead times, but with so many product offerings, it's not always possible to do so.

Products are kept in stock with our vendors, distributors, or partnered warehouses.

Please note: some products are custom made. For these products, check product description for lead times.

To check item stock or lead time please contact our support staff.

Orders are processed within 1-5 business days after order placement. Business days are Monday-Friday.

Most orders are delivered within 7-10 business days of order shipment.

Please note: some products are made to order or have longer lead / shipping times. Review product description for this information.

If product is out of stock or has longer lead time we will notify you.

To review fitment, check the fitment tab on the product description.

If you're still unsure, please contact our support staff.