MAD Catback Exhaust - G20 M340i | G22 M440i

Regular price $1,699.00
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-1 in stock

The MAD BMW M340 M440 catback exhaust system is a statement in refined power and acoustics. Engineered with meticulous attention to detail, this exhaust system redefines the sound and performance of your BMW M340 or M440.

One of the standout features of this exhaust system is that it reuses the stock tips, providing a seamless integration with the aesthetics of your BMW. The system is a full catback, designed to offer the richest sound possible, turning every drive into an exhilarating experience.

Installation is a breeze with no cutting required. This system is 100% plug and play, making it a completely reversible modification if you ever wish to return to the stock exhaust.

Constructed entirely from 304 stainless steel, this exhaust system is as durable as it is striking. The larger diameter piping enhances the flow, promoting superior performance and a sportier, more enjoyable sound.

The stock exhaust valve actuator is repurposed and an additional valve/actuator is integrated on the opposing side to ensure even flow, regardless of the valve position. The computer-controlled exhaust valves are retained to limit noise during low speed driving while fully opening under high-load conditions, ensuring the perfect balance between sound and performance.

Included with the exhaust system is easy-to-follow, bolt-on installation hardware. This makes the MAD BMW M340 M440 catback exhaust system a transformative addition to your vehicle that is not only impactful in performance, but also simple to implement.

  • Reuses the stock tips for seamless integration with your BMW's aesthetic
  • Full catback design for optimal sound performance
  • Requires no cutting, offering a 100% plug and play installation
  • Completely reversible modification
  • Constructed entirely from 304 stainless steel for superior durability
  • Larger diameter piping for increased flow and performance
  • Repurposes stock exhaust valve actuator and adds an additional valve/actuator on the opposing side to ensure even flow
  • Retains computer-controlled exhaust valves to balance sound and performance
  • Comes with easy-to-follow, bolt-on installation hardware



  • 2019 - 2023 BMW M340i G20 
  • 2019 - 2023 BMW M440i G22 

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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.