SKU: 22064641271

MAD Axle Back Exhaust - BMW / G8X / S58 / M3 / M4

Sale price$837.27 Regular price$930.30
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Ships within 48 hours · Estimated delivery Jul 14 - Jul 19

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Description

MAD Axle Back Exhaust - BMW / G8X / S58 / M3 / M4MAD BMW M3 M4 G8x S58 Axle Back Exhaust Unleash the full potential of your G8x M3 M4 with the MAD Axle Back Exhaust system, designed to elevate both the sound and performance of BMWs iconic S58 engine. Engineered with precision and passion, this exhaust system ensures your driving experience is as exhilarating as it is distinctive. Key Features: Enhanced Sound Quality: Say goodbye to the stock rasp and hello to a deeper, more resonant tone. The MAD

MAD BMW M3/M4 G8x S58 Axle Back Exhaust

Unleash the full potential of your G8x M3/M4 with the MAD Axle Back Exhaust system, designed to elevate both the sound and performance of BMW’s iconic S58 engine. Engineered with precision and passion, this exhaust system ensures your driving experience is as exhilarating as it is distinctive.

Key Features:

  • Enhanced Sound Quality: Say goodbye to the stock rasp and hello to a deeper, more resonant tone. The MAD Axle Back Exhaust is crafted to provide a rich, aggressive exhaust note that embodies the spirit of performance, enhancing the S58’s inherent roar without overwhelming cabin noise.

  • Increased Flow and Performance: With a larger tubing diameter of 76mm (compared to the stock 70mm), this system reduces backpressure and promotes smoother exhaust flow, resulting in noticeable gains in horsepower and torque. Expect a robust performance boost, with up to +5 HP and +5 lb-ft of torque, enhancing both acceleration and throttle response.

  • Versatile Exhaust Modes: Featuring a valved design, the MAD exhaust system allows you to switch between a subdued, deep tone during low-speed cruising and an aggressive, near-straight pipe sound at high loads. The stock exhaust valve actuators are retained, ensuring seamless operation via the M-drive settings, giving you control over your car’s sound profile.

  • Quality Construction: Built to last, the entire system is made from 100% T304 stainless steel, ensuring durability and resistance to corrosion. TIG-welded for superior strength and visual appeal, the exhaust system is meticulously brush-finished, offering a sleek, polished look right out of the box.

  • Seamless Integration: Designed for a factory-like fit, the MAD Axle Back Exhaust includes all necessary mounting hardware for easy installation. The quad 4-inch (100mm) clamp-on tips are engineered to fit perfectly within the factory cut-outs, enhancing the car’s aesthetics with a refined, OEM+ appearance.

  • Optimized for Performance: The system’s drone-abatement technologies effectively reduce cabin resonance, providing a pleasurable driving experience without intrusive noise. Whether you’re cruising on the highway or tackling twisty backroads, the MAD exhaust ensures a harmonious blend of performance and comfort.

Specifications:

  • Diameter: 76mm tubing for increased flow

  • Tips: Quad 4-inch (100mm) clamp-on tips

  • Weight: 7 pounds lighter than the stock axle-back (Stock: 44 pounds vs. MAD: 37 pounds)

  • Construction: 100% T304 stainless steel

  • Compatibility: Connects to factory midpipe (cutting required) or MAD single midpipe (no cutting required)

  • Includes: Extended valve harness and all necessary mounting hardware

 

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: 22064641271

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Leonardo Perez
Houston, US
★★★★★ 1
Mal presentado
Size: 9, Color: Black Full Grain
Un zapato llego con cosido defectuoso
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Reviewed in the United States on October 29, 2025
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Joe
Battle Creek, US
★★★★★ 5
Comfortable
Size: 11.5, Color: Black Full Grain
Fit great very comfortable
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Reviewed in the United States on October 16, 2025
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DAVID L.
Alexandria, US
★★★★★ 5
Nice shoes!
Size: 11, Color: Black Full Grain
I bought them in black and I like them so much I will be buying the brown soon. They fit true to size and are comfortable and stylish. I like the clean simplicity. They're basically a dressy sneaker which is perfect for my job's 'dress code'. Yet they're stylish enough to be worn weekends or a night out. They seemed just a touch stiff out of the box but IMO that's completely normal and fine - after just a couple days of wearing them they are breaking in nicely. No complaints on that. They seem to be of very high quality and I'm very happy with them.
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Reviewed in the United States on February 8, 2026
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Bamaphan
Pawtucket, US
★★★★★ 5
Good shoes!!!!!
Size: 10, Color: Tan Full Grain
They are comfortable, they fit, great style. I bought blue, brown and black shoes.
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Reviewed in the United States on August 18, 2025
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Shawn
Cuba, US
★★★★★ 5
Great Product
Size: 13, Color: Black Full Grain
2nd Johnston & Murphy comfortable and stylish.
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Reviewed in the United States on December 26, 2025

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