Service Completed: Custom Downpipe-Back Exhaust System & Jap Style Back Box

At MIJ Exhaust Ltd, we recently completed a custom downpipe-back exhaust system on a 2003 Subaru Impreza WRX STI 2.0L turbocharged petrol, giving the car a more aggressive exhaust setup and a classic performance-inspired finish.

For this build, we fabricated and fitted a custom downpipe-back exhaust system, replacing the existing exhaust from the downpipe rearwards with a bespoke setup designed specifically for the vehicle.

The system was finished with a Jap style back box, giving the Impreza the distinctive performance look associated with Japanese tuning culture while complementing the aggressive styling of the WRX STI.

As with all our custom exhaust work, the system was fabricated and fitted in-house, with careful attention to pipework, fitment and alignment to ensure a clean and quality finish throughout.

Whether you’re looking for a downpipe-back exhaust, Jap style back box, custom Subaru exhaust system, or a bespoke WRX STI exhaust upgrade, our team can design and fabricate a setup to suit your vehicle and preferred style.

We’ve also got a video of this build, showcasing the exhaust work and finished setup, so you can see the results and hear how the Subaru sounds.
https://www.instagram.com/p/DcMAKbZkkAi/

The gallery showcases this 2003 Subaru Impreza WRX STI 2.0L turbocharged petrol custom exhaust upgrade, featuring a bespoke downpipe-back system and Jap style back box.

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