SKU: 50131762408

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

Sale price$149.40 Regular price$166.00
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 13 - Aug 18

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Description

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

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

Fitment:

  • 2018+ BMW M2 Competition
  • 2014+ BMW M3
  • 2015+ BMW M4
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 50131762408

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★★★★★ 5
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Reviewed in the United States on May 23, 2026
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★★★★★ 5
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Reviewed in the United States on February 12, 2026
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Jessie Stephens
Pawtucket, US
★★★★★ 5
Good quality for a decent price point
Excellent set for a reasonable price. Eye serum is not good for those with super sensitive skin (like those prone to eczema), but otherwise works for us!
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Reviewed in the United States on January 17, 2026
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Daniela Lemus
Massapequa, US
★★★★★ 5
Ordinary
Great gift for my mother, she enjoys the brand and feels great on the skin
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Reviewed in the United States on July 24, 2025
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Daniela Esquivel
Louisville, US
★★★★★ 4
So far I like it
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Reviewed in the United States on November 24, 2025

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