BMW 135i E82/E88 N54 Axle-Back Exhaust Back Box – Supersprint Stainless Steel Performance Rear Muffler/Silencer, EC Type Approved, Road Legal UK (2007–04/2010, Coupe & Convertible/Cabrio)

Premium axle-back upgrade for BMW 135i owners who want a richer soundtrack, factory-level fitment and road-legal peace of mind.

This genuine Supersprint rear section transforms the character of the 135i with a deeper, sportier tone while keeping motorway manners intact. Crafted in stainless steel for long-term durability, it is a direct-fit back box designed specifically for the N54 twin turbo models built from 2007 up to 04/2010, covering both E82 Coupe and E88 Convertible.

• Designed for the N54 twin turbo 3.0 straight-six 135i only, model years 2007 to April 2010
• EC type-approved and MOT compliant in the UK for hassle-free daily use
• Axle-back rear muffler configuration for a refined, sporty tone without harshness
• Stainless steel construction for corrosion resistance and longevity
• Straightforward installation using standard mounting points

Why 135i owners choose this upgrade

• Brings out the classic N54 sound with a deeper note and crisp character under load
• Quality fit and finish from a renowned European manufacturer
• Ideal for enthusiasts seeking an enhanced soundtrack that remains civilised on the commute

Real-world feedback
We have fitted this system for customers and feedback has been consistently positive. Owners love the improved tone, the clean look and the fact it remains UK road legal.

Compatibility
BMW 135i E82 Coupe and E88 Convertible with the N54 engine only, from 2007 to 04/2010. Not suitable for later N55-engined vehicles.

Installation and fitting service
Prefer professional fitting. Book with MJ Modifications in Warwickshire. Request a quote via info@mjmodifications.co.uk.

Common search terms
BMW 135i exhaust upgrade, E82 backbox, E88 axle back, N54 rear muffler, BMW 135i stainless steel rear box, BMW 135i sound upgrade, UK road legal performance exhaust, EC approved BMW 135i rear section.