🔧 Service Completed: Custom Dual-Exit Back Box Delete

At MIJ Exhaust Ltd, we recently carried out a custom back box delete on this BMW 330e M Sport 2021 Turbocharged, giving the plug-in hybrid a more engaging exhaust note while retaining its everyday drivability.

For this build, we fabricated a bespoke dual-exit back box delete, designed to improve exhaust flow and allow more of the engine’s natural tone to come through. The result is a deeper, sportier exhaust note with increased presence under acceleration, while remaining comfortable and refined during normal driving.

The custom system enhances the character of the turbocharged powertrain without compromising the clean, factory-inspired appearance of the rear of the vehicle, making it an ideal upgrade for owners looking for a more enjoyable driving experience.

As with all of our custom exhaust work, the entire system was fabricated and installed in-house using high-quality materials and precision craftsmanship, ensuring excellent fitment, long-lasting durability, and a professional finish throughout.

We’ve got a full video of the completed installation along with a sound demonstration, so you can see the finished system and hear the difference the custom back box delete makes.

Check out the video and let us know what you think of this BMW 330e M Sport transformation.

https://www.instagram.com/p/DYz6pujCW9S/?hl=en

 

Why Choose a Custom MIJ Exhaust?

No two vehicles—and no two customers—are alike. That’s why every exhaust system we build is custom-made on the vehicle for the perfect fit, tone, and performance.

Whether you’re after:

  • A sportier, more aggressive sound,
  • A performance-focused setup, or
  • A refined, OEM-style tone,

    • —we tailor the design specifically to your goals.

     

    More Than Just Custom Builds

    We provide all types of exhaust services, including:

  • Exhaust repairs and leak fixes
  • Section replacements
  • Welding cracks and fault correction
  • Tailpipe upgrades and cosmetic enhancements
  • Small adjustments and one-off jobs

    • No job is too small.

     

    Want to Know How We Build Your System?

    Learn more about our process on our Exhaust Construction page: https://www.mijexhaust.com/exhaust-construction/

     

    Get Your Personalised Quote

    Use the enquiry form on the side of this page, and our team will get back to you with a tailored estimate.

     

    See More of Our Work

    Check out our social channels for videos, sound clips, and behind-the-scenes content:

    Instagram: https://www.instagram.com/mijperformanceexhaust/
    Facebook: https://www.facebook.com/MIJPerformanceExhausts
    YouTube: https://www.youtube.com/@MIJPERFORMANCEcom/shorts
    TikTok: https://www.tiktok.com/@mij_performance