MAD S58 Axle Back Exhaust - F97 X3M | F98 X4M
MAD S58 Axle Back Exhaust - F97 X3M | F98 X4M
MAD S58 Axle Back Exhaust - F97 X3M | F98 X4M
MAD S58 Axle Back Exhaust - F97 X3M | F98 X4M
MAD S58 Axle Back Exhaust - F97 X3M | F98 X4M

MAD S58 Axle Back Exhaust - F97 X3M | F98 X4M

Regular price $1,599.00
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Unlock the true potential of your BMW X3M or X4M with the MAD Axle Back Exhaust. Designed to deliver a sporty, deep, and aggressive sound, our axle back system comes with three stunning tip options: brushed, black, and carbon fiber.

Key Features:

  • Three Tip Options: Choose from brushed, black, or carbon fiber tips to match your style.
  • Stock Valve Integration: Reuses the stock valves for full control over the sound level,
  • Versatile Sound Control:
    1- Valves Closed: All air passes through the muffler for a quiet ride.
    2- Valves Open: Air is split between the muffler and muffler bypass for a sporty, aggressive sound without excessive drone or rasp.
  • Improved Sound Quality: Replaces the muffled stock tone with a rich, dynamic exhaust note.

2019 - 2023 BMW X3M F97
2019 - 2023 BMW X4M F98

Elevate your BMW X3M or X4M's sound with the MAD Axle Back Exhaust and experience the thrill of a true performance vehicle.


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


Orders typically ship in 1-2 business days from our location in Los Angeles, CA. Transit time usually ranges from 3-5 business days, depending on where you are located. We offer worldwide shipping, if you need live outside of North America, shoot us an email and we would be happy to give you a quote!

Creating life-long customers.

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. At Horizon Motorsport our mission is to provide a unparalleled customer experience to keep our customers coming back.

A Company Owned By Fellow 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. Our unique insight and experience with the BMW community and other high end European-oriented brands gives us the knowledge and ability to stock only the highest quality parts from the highest quality brands.