BMW 420i Rear Conversion

BMW 420i M Sport – Back Box Delete & Blue Carbon Fibre M Sport Tips at MIJ Exhaust! 🔥

This BMW 420i M Sport rolled into MIJ Exhaust for a back box delete, paired perfectly with blue carbon fibre M Sport tips — a clean upgrade that delivers both sound and style in one hit. 😎💨

Removing the back box sharpens the exhaust note, giving the 420i a crisper, more aggressive tone while still keeping things perfectly usable for everyday driving. It adds just the right amount of character to match the sporty nature of the M Sport package.

Finished off with blue carbon fibre M Sport tips, the rear end now looks as good as it sounds – a bold, premium touch that completes the look.

To showcase the transformation, we’ve added before and after images – self explanatory and perfect to see the impact of this conversion.

The result?
🔊 Sharper sound
👀 Standout styling
A perfect sound-and-style combo

Want to hear how it sounds? See link below:
https://www.instagram.com/p/DTkSdjfFB0G/

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