Milltek Cat-back Exhaust for Seat Leon Cupra K1 (2007-2009) – Sharper Sound, Reduced Back Pressure
This is Milltek's cat-back system for the Seat Leon Cupra K1. 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 offered in non-resonated or resonated versions, so you can pick the setup that suits how the car's used.
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: Single 152x102mm Oval
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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
- Resonated (quieter) or non-resonated (louder) versions
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- Seat Leon Cupra K1 (2007-2009)
Not suitable for: the Seat Leon Cupra R 310PS, which needs the Milltek Cat-back Exhaust Seat Leon Cupra R 310PS 18-20; the Seat Leon Cupra 2.0T FSI 240PS, which needs the Milltek Cat-back Exhaust Seat Leon Cupra 2.0T FSI 240PS 06-11; the Seat Leon Cupra R 2.0 TSI 265PS, which needs the Milltek Cat-back Exhaust Seat Leon Cupra R 2.0 TSI 265PS 10-12.
Installation
We recommend professional fitting on a ramp. Once fitted, check the tailpipe alignment and re-check all clamps after the first few hundred miles.
What's the difference between the resonated and non-resonated versions?
The resonated version adds extra silencing for a quieter, more refined tone. The non-resonated version leaves it out, so it is louder and more aggressive.
Does it fit the Seat Leon Cupra R 310PS?
No. For that car, choose the Milltek Cat-back Exhaust Seat Leon Cupra R 310PS 18-20.
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.
