Genuine BMW N55 M Performance Rear Silencer/Muffler Exhaust - F22 F30 F31 F32 F33 F36 (M235i, 335i, 435i) - OEM Stainless Steel, 2x80mm M Tips - PN 18302354340

OEM rear box upgrade for BMW F22, F30, F31, F32, F33, F36 N55 (M235i, 335i, 435i) with twin 80mm M tips

Transform the soundtrack and finish of your N55-powered F2x/F3x with the factory-original rear section engineered by BMW M. This axle-back back box delivers a deeper, more characterful note from the straight-six while remaining refined on the motorway. Built in high-grade stainless steel and finished with twin 80mm outlets embossed with the M logo, it’s the perfect OE+ sound and style upgrade with true plug-and-play fitment.

• Factory original M rear box for N55 F-series models (OE quality, precise alignment, no compromise)
• Stainless construction for longevity and corrosion resistance
• Twin 80mm tailpipe finishers with M branding for an authentic motorsport look
• Sportier tone outside, composed cabin acoustics for daily use
• Optimised gas flow for freer breathing and responsive performance feel
• Direct bolt-on rear section designed specifically for the chassis listed below

We’ve fitted this system for multiple customers and the feedback is consistently positive: premium fit and finish, a richer straight‑six note, and that OEM+ upgrade you can live with every day.

Compatibility

• 2 Series F22 N55 M235i / M235i xDrive Coupe (2013–2016)
• 3 Series F30 N55 335i / 335i xDrive Saloon (2011–2015)
• 3 Series F31 N55 335i / 335i xDrive Touring (2011–2015)
• 4 Series F32 N55 435i / 435i xDrive Coupe (2012–2016)
• 4 Series F33 N55 435i / 435i xDrive Convertible (2013–2016)
• 4 Series F36 N55 435i / 435i xDrive Gran Coupe (2013–2016)

Note: For vehicles with Sport Automatic transmission (option 02TB).

Part numbers

Main rear silencer: 18302354340

Tailpipe finishers:

• Chrome: 18302354364
• Carbon: 18302355889

Professional fitting

Want it installed by specialists? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.

Compatibility check

We’ll verify suitability before dispatch. Add your UK reg or last 7 of VIN at checkout so we can confirm the correct part for your car.

Warranty

Two‑year manufacturer warranty when a VIN is provided at checkout.

Search terms: M235i back box, F22 M235i axle‑back, 335i rear box F30/F31, 435i sports rear section F32/F33/F36, BMW N55 sound upgrade, OE BMW M rear silencer, stainless steel rear section with M tips, twin 80mm tailpipes, F-series performance backbox, BMW straight‑six tone upgrade, xDrive compatible rear section, F30 335i exhaust upgrade UK, F32 435i axle back UK, BMW factory rear box N55, M logo tailpipe finishers, plug‑and‑play BMW rear section, F36 Gran Coupe rear silencer, quiet cruising no drone, performance sound without cabin boom.