Cobra Sport Performance Cat Back Exhaust System for BMW 1 Series M135i F20/F21 (2011-2015) - 3in (76.2mm) - Resonated or Non-Resonated - Chrome, Black or Carbon Tips - Fits RWD & xDrive

Cobra Sport catback for BMW M135i F20 F21, 76.2 mm bore, tailored sound and premium tip options

Transform the character of your 1 Series hot hatch with this Cobra Sport catback designed for the M135i F20 and F21. Running from the catalytic converter section rearwards, this free-flowing 3 inch 76.2 mm system replaces the mid pipe and rear box to deliver a deeper, cleaner tone while retaining the factory catalysts. We have fitted this setup at MJ Modifications and the fit, finish and acoustics continue to impress us and our customers.

• 76.2 mm bore pipework for improved gas flow and an authentic performance soundtrack
• Two sound levels - choose resonated for refined daily use or non-resonated for a louder, more aggressive note
• Tail trim choices to suit your build - polished, stealth black ceramic coated or real carbon fibre
• Direct replacement for the original centre and rear sections - no cutting of OE catalysts
• Complete kit with clamps and gaskets supplied
• Cobra Lifetime Warranty non-transferable

Why this upgrade is a winner

Looking for a richer exhaust tone without drone and without touching the OE cats? This catback delivers. The 3 inch 76.2 mm pipework unlocks a purposeful, motorsport-inspired voice that enhances the N55 soundtrack while remaining civil on the motorway, especially in resonated form. We have installed many of these systems for M135i owners and feedback has been consistently positive on sound quality and fitment.

Sound options

• Resonated - includes a centre silencer for a subtle, sophisticated upgrade in volume and tone, ideal for daily driving.
• Non-resonated - straight-through centre section for a bolder, harder-edged note that stands out.

Tail trim finishes

• TP91 - 3.5 inch 88.9 mm polished inverted slash cut
• TP38 - 4 inch 101.6 mm polished inverted slash cut
• TP38-BLK - 4 inch 101.6 mm black ceramic coated inverted slash cut
• TP107-CF - 4 inch 101.6 mm carbon fibre slash cut
• TP108-CF - 4 inch 101.6 mm carbon fibre slash cut

Vehicle fitment

• BMW 1 Series F20 2011 to 2015
  • M135i and M135i xDrive all-wheel drive
• BMW 1 Series F21 2011 to 2015
  • M135i and M135i xDrive all-wheel drive
• Compatible with rear-wheel drive and xDrive variants

What is included

• Cobra Sport catback centre and rear sections
• Resonated or straight-through centre section depending on selection
• Your chosen tail trim style
• All required fittings and gaskets

Part numbers

• BM75TP91 Resonated - TP91
• BM74TP91 Non-resonated - TP91
• BM75TP38 Resonated - TP38
• BM74TP38 Non-resonated - TP38
• BM75TP38-BLK Resonated - TP38-BLK
• BM74TP38-BLK Non-resonated - TP38-BLK
• BM75TP107-CF Resonated - TP107-CF
• BM74TP107-CF Non-resonated - TP107-CF
• BM75TP108-CF Resonated - TP108-CF
• BM74TP108-CF Non-resonated - TP108-CF

Professional installation

Want it fitted perfectly first time? Book your install with MJ Modifications in Warwickshire. We can advise on resonated versus non-resonated based on your driving style and expectations, then handle the install in-house. Request a fitting quote at info@mjmodifications.co.uk.

Warranty

Backed by Cobra Lifetime Warranty non-transferable.

Media

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