Milltek Sport Rear Silencer Back Box - Race, Cerakote Black Tips - BMW M135i F20/F21 (3 & 5 Door) 2012+ Performance Axle-Back Exhaust

Milltek rear section with Cerakote black tailpipes for BMW M135i F20 F21 2012 on

Give your BMW M135i the soundtrack it deserves. This Milltek Sport rear section delivers a deeper, more assertive tone with a crisp, performance-led character, finished with stealth black ceramic-coated tailpipes for a subtle factory-plus look. Tailored specifically for the 2012 onwards M135i hatchback in both F20 5-door and F21 3-door formats, it is the ideal upgrade for drivers who want more presence without compromising everyday usability.

Crafted in the UK from premium T304 non-magnetic stainless steel, the system resists corrosion and discolouration for long-term durability. Flow-optimised, mandrel-formed tubing maintains a consistent internal diameter to help gases move smoothly, while Milltek’s acoustic development targets a strong, motorsport-inspired note with reduced in-cabin boom compared with many straight-through alternatives.

• Purpose-built rear muffler for BMW M135i F20 5-door and F21 3-door 2012 on
• Track-inspired sound profile for a louder, more engaging note
• Stealth black Cerakote tailpipes for a premium, hard-wearing finish
• T304 stainless construction for excellent longevity and corrosion resistance
• Mandrel-formed pipework for smooth gas flow and sharp throttle response
• Acoustically developed to reduce unwanted resonance inside the cabin
• Made in the UK by Milltek Sport

Compatibility

Fits BMW M135i F20 5-door and F21 3-door from 2012 onwards. Rear section upgrade only, retaining the factory catalyst and mid-section components.

Why enthusiasts choose this rear box

• Noticeably richer, sportier tone without sounding harsh
• Black ceramic-coated outlets that complement OEM styling
• High-quality materials engineered for daily use and spirited driving
• Designed to work with stock mounting points for a straightforward install

Our experience

We have fitted this Milltek rear section to multiple M135i builds and feedback has been consistently positive. Owners love the deeper idle, pronounced growl under load and the refined finish on the Cerakote tips. It brings the car to life while keeping long journeys perfectly manageable.

Fitting and support

Professional installation recommended. Book fitting with MJ Modifications in Warwickshire. For a quote, email info@mjmodifications.co.uk.

Good to know

This is a louder, track-leaning option. Please check local noise regulations before road use.

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