Milltek Cat-back Exhaust for BMW 1 Series 118d & 120d M Sport 3-door (E81) (2007-2012) – Sharper Sound, Reduced Back Pressure
This is Milltek's cat-back system for the BMW 1 Series 118d & 120d M Sport 3-door (E81). It replaces everything from the factory catalytic converter rearward with wider-bore pipework, a re-profiled mid-pipe and silencers tuned specifically for this platform, cutting back pressure and sharpening the exhaust note. The factory catalytic converter stays in place, so the car's emissions hardware is left as standard.
It's aimed at owners who want a noticeably different sound and a genuine, if modest, flow improvement without touching anything upstream of the cat: a straightforward bolt-on that doesn't need a remap or any other supporting mods to enjoy.
Specifications
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System Type: Cat-back
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Pipe Diameter: 69.85mm (2.75")
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Tip Style: Twin 76.2mm Special
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EC Approved: No
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Race System: No
Key Features
- Made from T304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration
- Mandrel-bent pipework keeps a constant diameter through every bend for unrestricted flow
- 69.85mm (2.75") pipework
- Replaces the standard exhaust from the catalytic converter back, so the factory cat is retained
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- BMW 1 Series 118d & 120d M Sport 3-door (E81) (2007-2012)
- BMW 1 Series 118d & 120d M Sport 5-door Hatchback (E87) (2004-2011)
- BMW 1 Series 123d M Sport 3-door (E81) (2007-2012)
- BMW 1 Series 123d M Sport 5-door Hatchback (E87) (2004-2011)
Not suitable for: the BMW 1 Series 118d & 120d M Sport Coupé (E82), which needs the Milltek Cat-back Exhaust BMW 1 Series 118d 120d M Sport Coupé E82 08-12; the BMW 1 Series M135i 3 & 5 Door (F21 & F20, Non-xDrive), which needs the Milltek Cat-back Exhaust BMW 1 Series M135i 3dr 5dr F21 F20, Non-xDrive 12-16; the BMW 1 Series M140i 3 & 5 Door (F20 & F21 LCI, Non-OPF), which needs the Milltek Cat-back Exhaust BMW 1 Series M140i 3dr & 5dr F20 & F21 LCI, Non-OPF 15-18.
Installation
Before ordering, note: Requires rear mounting brackets (Part numbers: 18 30 7 806 567 and 18 30 7 574 951) for the 123d model (available from your BMW dealer). We recommend professional fitting on a ramp. Once fitted, check the tailpipe alignment and re-check all clamps after the first few hundred miles.
Will it fit the BMW 1 Series 118d & 120d M Sport 5-door Hatchback (E87)?
Yes. Milltek lists this part for the BMW 1 Series 118d & 120d M Sport 5-door Hatchback (E87) as well as the other models in the fitment list above.
Does it fit the BMW 1 Series 118d & 120d M Sport Coupé (E82)?
No. For that car, choose the Milltek Cat-back Exhaust BMW 1 Series 118d 120d M Sport Coupé E82 08-12.
Is it road legal?
Milltek does not list EC approval for this part. Any exhaust used on the road must still meet noise and emissions rules, so check the requirements where you live.
Do I need a remap?
No. It fits behind the factory catalytic converter, so no software changes are needed.
Does it keep the factory catalytic converter?
Yes. It fits behind the factory catalytic converter, which stays in place.
What is it made from?
T304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration better than lower grades.
Is there a warranty?
Yes. Milltek products are covered against defects in materials and workmanship. Contact us with your order number if you have a problem.
