MAD X3 X4 M40 Catback Exhaust B58 G01 G02

$1,699.00
(2 reviews) Write a Review

MAD X3/X4 M40 Catback Exhaust B58 G01/G02 Unleash the Ultimate Sound and Performance

Experience the perfect blend of sound, performance, and style with the MAD Catback Exhaust System for your BMW X3 M40i (G01) and X4 M40i (G02) equipped with the B58 engine.

Elevate Your Driving Experience

Transform your BMW's exhaust note to a deep midrange sound that is both exhilarating and refined. The MAD Catback Exhaust delivers a rasp-free, zero drone, and zero rattle experience, ensuring every drive is as enjoyable as possible.

Key Features

  • Deep Midrange Sound

    • Enjoy a rich, full-bodied exhaust tone that enhances your vehicle's sporty character without being overly aggressive.
  • Rasp-Free Performance

    • Engineered to eliminate unwanted raspiness, providing a clean and crisp exhaust note throughout the RPM range.
  • Zero Drone Technology

    • Designed with precision to prevent cabin drone at cruising speeds, ensuring a comfortable driving experience.
  • Zero Rattle Construction

    • High-quality materials and expert craftsmanship eliminate any potential rattles, giving you peace of mind.
  • Single Y-Midpipe Design

    • Utilizes a single Y-midpipe for the cleanest sound possible, optimizing exhaust flow and reducing turbulence.
  • Central Exhaust Layout

    • The central exhaust configuration enhances acoustics, delivering the best and cleanest sound with absolutely zero drone.
  • Dual Valve System

    • Replaces the stock single valve with a dual-valve setup for maximum flexibility:
      • Valves Closed: Achieve a conservative, subtle sound ideal for daily driving.
      • Valves Open: Unleash a more aggressive exhaust note for an exhilarating experience.
  • Consistent 70mm Piping

    • Features 70mm piping throughout to ensure the most even and balanced sound output.
  • 89mm Tip Outlets

    • Large 89mm exhaust tips enhance the visual appeal and are available in:
      • Brushed Stainless Steel
      • Matte Black
      • Carbon Fiber

Why Choose the MAD Catback Exhaust?

  • Enhanced Performance

    • Improved exhaust flow leads to better engine efficiency and potential horsepower gains.
  • Customized Sound Control

    • Switch between a subtle or aggressive exhaust note with the dual-valve system.
  • Quality Construction

    • Made from premium 304 stainless steel material for durability and longevity.
  • Easy Installation

    • Direct bolt-on replacement requires no cutting or welding.
  • Aesthetic Upgrade

    • The stylish exhaust tips provide a sleek, sporty look to your BMW's rear profile.

Compatibility

  • BMW X3 M40i (G01)
  • BMW X4 M40i (G02)
  • Engine: B58 Turbocharged Inline-6

Installation

  • Direct Bolt-On Fitment
    • Uses factory mounting points for a seamless installation process.
  • All Hardware Included
    • Comes with all necessary clamps, bolts, and gaskets.

Unleash Your BMW's True Potential

Upgrade to the MAD X3/X4 M40 Catback Exhaust System and experience a transformative difference in your vehicle's sound and performance. With its advanced design and premium features, this exhaust system is the ultimate choice for discerning BMW enthusiasts.

2 Reviews Hide Reviews Show Reviews

  • 5
    Catback

    Posted by Elias on Mar 12th 2025

    The MAD catback for the X3/X4 M40i is a quality product. For those who are curious, this is not the same as the cheap version you can order direct from China. The muffler design on this is completely different and the pipe design is also different. The tips have 2 levels of adjustment. A rotory clamp allows 360 degrees of adjustment and the tip clamp allows front to back adjustment. Align everything till it's perfect, not just to good enough like others. Add to this you get a 90 day full satisfaction warranty and a lifetime warranty on defects. All their parts are here in the USA and ship direct from Nevada. I got mine in just a week. The cherry on the cake is their customer service is quick to respond when you have issues or questions. Try calling China for help. Remember also that the price includes shipping. Most other companies add shipping of over $150 on an exhaust.

  • 5
    X4 M40i

    Posted by Elias on Feb 27th 2025

    The quality of this product is excellent. Getting it installed and lining everything up takes a bit of time and I would highly recommend doing this on a lift. Once installed it sounds great. It's not loud it's just deeper and more throaty and all the pops and burbles that were missing before are now there.

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