Genuine BMW 135i N55 E82/E88 Performance Exhaust Mid Pipe - Centre/Center Muffler Middle Silencer Resonator Section / Intermediate Pipe - 1 Series 2009-2013 Coupe/Convertible | E82 1M Upgrade | OEM 18307599743

BMW 1 Series 135i N55 E82 E88 Performance Exhaust Middle Section | Genuine OE Upgrade

Unlock the straight-six soundtrack you want with the original BMW performance exhaust middle section for the 135i N55. This factory-engineered intermediate assembly replaces the restrictive centre box on the E82 Coupe and E88 Cabriolet, delivering a sharper turbo response, a richer tone and everyday refinement. Designed by BMW for perfect alignment and long-term durability, it is a simple bolt-on enhancement that elevates drivability without unwanted cabin drone.

Part number: 18307599743 — the correct BMW dealer-supplied component for the N55-powered 135i produced from 09/2009 to 10/2013.

Why enthusiasts choose this factory middle section

• Original BMW performance piece for N55 3.0 turbo six — precise fit and finish
• Direct replacement intermediate pipe for quick, clean, bolt-on installation
• Crisper spool characteristics and livelier throttle feel
• Deep, motorsport-inspired note with refined volume and no droning at motorway speeds
• Ideal platform for future tuning and rear section upgrades
• Built to OEM standards for reliability, corrosion resistance and longevity

What you will notice on the road

• More character from the N55 under load, yet civil around town
• Smoother flow through the exhaust midsection for a responsive, eager feel
• A tasteful sound increase that keeps daily comfort intact

Fitment

• BMW 1 Series 135i N55 — E82 Coupe and E88 Convertible — 09/2009 to 10/2013

Can also be installed on the E82 1M Coupe (2011–2012) as an upgrade. Please note there will be no warranty coverage for this application, as it is not a recognised BMW retrofit.

Real-world results

We have fitted this component on customer cars and our own builds with excellent feedback. Owners consistently report a cleaner, stronger exhaust note and a more responsive feel without harshness. It is the sweet spot between stock quiet and overly loud track systems.

Installation

Plug-and-play replacement for the standard centre assembly. For professional fitting, alignment and leak-free joints, book with MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.

Compatibility check before dispatch

We verify suitability before shipping. Add your UK registration number or the last 7 characters of your VIN at checkout so we can confirm you receive the correct 135i N55 exhaust middle section.

Warranty

Two years manufacturer warranty for UK customers and one year manufacturer warranty for international customers when a valid VIN is provided at checkout on compatible vehicles.

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Note: Local regulations may apply to exhaust alterations. Please check requirements in your area.