Milltek Cat-back Exhaust for Seat Leon 1.8T Sport and Cupra 180PS (2000-2005) – Sharper Sound, Reduced Back Pressure
This is Milltek's cat-back system for the Volkswagen Golf Mk4 GTI 1.8T. 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: 63.5mm (2.5")
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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
- 63.5mm (2.5") 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 1.8T Sport and Cupra 180PS (2000-2005)
- Seat Leon Cupra 1.9 TDi 90PS/110PS/150PS (2000-2005)
- Volkswagen Golf Mk4 1.9 TDI PD and non-PD (2000-2004)
- Volkswagen Golf Mk4 GTI 1.8T (1998-2004)
Not every version fits every car in this list. Check the fitment shown for the option you select.
Not suitable for: any model, engine or body style not listed above. Check your car before ordering.
Installation
Some versions: Non-resonated. May require 4-Motion rear valance (part number 1J6807521C) from your VW dealer. Some versions: Resonated. May require 4-Motion rear valance (part number 1J6807521C) from your VW 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.
Which tailpipe finishes are available?
You can choose from: GT-80 Polished, Discreet Polished. The finish is cosmetic and does not change the sound.
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.
Will it fit the Seat Leon Cupra 1.9 TDi 90PS/110PS/150PS?
Yes. Milltek lists this part for the Seat Leon Cupra 1.9 TDi 90PS/110PS/150PS as well as the other models in the fitment list above.
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.
