MAD S58 3.5" Fat Boy Downpipes - G80 M3 | G82 / G83 M4
MAD S58 3.5" Fat Boy Downpipes - G80 M3 | G82 / G83 M4
MAD S58 3.5" Fat Boy Downpipes - G80 M3 | G82 / G83 M4
MAD S58 3.5" Fat Boy Downpipes - G80 M3 | G82 / G83 M4
MAD S58 3.5" Fat Boy Downpipes - G80 M3 | G82 / G83 M4
MAD S58 3.5" Fat Boy Downpipes - G80 M3 | G82 / G83 M4

MAD S58 3.5" Fat Boy Downpipes - G80 M3 | G82 / G83 M4

$549.00
/
Shipping calculated at checkout.

-2 in stock

The MAD 3.5" S58 Fat boy is the largest BMW S58 catless downpipe on the market!

Upgrade from the stock S58 downpipes to the MAD 3.5" Fat Boy  S58 catless downpipes for maximum airflow, power, and sound!

Upgrade to the MAD BMW 3.5" Fat Boy  S58 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 S58 with stock turbos, even more on cars with upgraded turbos.

The flex pipe Section will help reduce the stress and unwanted vibration from the 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
  • 90 day return period
  • All orders ship in 1-2 business days
  • Spot on fitment
  • Flex section

Fitment:

  • 2021+ BMW M3 G80
  • 2021+ BMW M4 G82 G83

SKU: MAD-4047


Please contact us via the contact page form to start a return or exchange. The return/exchange process must be started within 1 week of delivery, after 1 week we will not be able to issue a refund/exchange. A 20% restocking fee will be applied to any return once the order has been shipped. For any questions regarding returns or exchanges feel free to contact us at sales@horizonmotorsport.com or reach out to us via the contact form and we would be happy to help.

You can find additional details on our return and exchange policy here.

 

 

OUR GOAL

Horizon Motorsport has one goal: to make our clients happy. We aim to provide the highest level of customer service and the highest caliber parts, all at the most competitive prices. Have a question or concern about a product we sell? Send us an email at sales@horizonmotorsport.com.

QUALITY is KEY

Every piece of carbon fiber that leaves our location in Los Angeles, CA is quality checked extensively prior to shipment. Every piece is backed up by our fitment and finish guarantee.

THE BEST CUSTOMER SERVICE

At Horizon Motorsport our mission is to provide unparalleled customer service. As a small business we pride ourselves on creating long lasting relationships with our customers who know that they can count on us for any of their BMW needs.

A COMPANY OWNED BY ENTHUSIASTS

Horizon Motorsport was founded in 2019 in Los Angeles, CA by fellow BMW enthusiasts. We have experience with nearly all makes and models and have been actively involved in the Southern California BMW scene for over 3 years. Because of our unique insight into the BMW community, we choose to carry only the highest quality parts from the highest quality brands on the market.