Milltek Filter-back Exhaust New for New Mini Mk4 Cooper S F66 2.0T B48 (2024 onwards) – Sharper Sound, Filter Retained
This is Milltek's particulate filter-back system for the New Mini Mk4 Cooper S F66 2.0T B48. It replaces everything downstream of the factory diesel or petrol particulate filter with wider-bore pipework and re-tuned silencers, cutting back pressure and sharpening the exhaust note. The filter itself is left exactly where the manufacturer fitted it, so emissions equipment is unaffected. It's offered in resonated EC approved or non-resonated versions and 5 tailpipe finishes, so you can pick the setup that suits how the car's used.
It's the right choice if you want a sportier sound and a genuine, if modest, flow improvement on a filter-equipped car, without going anywhere near the parts of the system that keep it emissions-compliant.
Specifications
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System Type: Particulate Filter-back
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Pipe Diameter: 76.2mm (3")
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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
- 76.2mm (3") pipework
- Fits behind the factory particulate filter, which stays in place
- Choice of 5 tailpipe finishes: GT-100 Brushed Titanium, GT-100 Burnt Titanium, GT-100 Cerakote Black, GT-100 Polished, JET-100 Carbon Fibre
- EC approved versions available
- Resonated (quieter) or non-resonated (louder) versions
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- New Mini Mk4 Cooper S F66 2.0T B48 (2024 onwards)
Not suitable for: the New Mini Mk4 JCW F66 2.0T B48 (OPF/GPF Models Only), which needs the Milltek Filter-back Exhaust New Mini Mk4 JCW F66 2.0T B48 OPF/GPF 24+.
Installation
Some versions: Non-Resonated (louder) OPF/GPF Back System Including Milltek Design Sport Diffuser Overlay - (Requires Cutting) with GT-100 Brushed Titanium Tips. Some versions: Non-Resonated (louder) OPF/GPF Back System Including Milltek Design Sport Diffuser Overlay - (Requires Cutting) with GT-100 Burnt/Blue TitaniumTips. Some versions: Non-Resonated (louder) OPF/GPF Back System Including Milltek Design Sport Diffuser Overlay - (Requires Cutting) with GT-100 Cerakote Black Tips. Some versions: Non-Resonated (louder) OPF/GPF Back System Including Milltek Design Sport Diffuser Overlay - (Requires Cutting) with GT-100 Polished Tips. We recommend professional fitting on a ramp. Once fitted, check the tailpipe alignment and re-check all clamps after the first few hundred miles.
Upgrade Further
Also available from Milltek for this car: Milltek GPF/OPF Bypass New Mini Mk4 Cooper S F66 2.0T B48 24+.
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.
Which tailpipe finishes are available?
You can choose from: GT-100 Brushed Titanium, GT-100 Burnt Titanium, GT-100 Cerakote Black, GT-100 Polished, JET-100 Carbon Fibre. The finish is cosmetic and does not change the sound.
Does it fit the New Mini Mk4 JCW F66 2.0T B48 (OPF/GPF Models Only)?
No. For that car, choose the Milltek Filter-back Exhaust New Mini Mk4 JCW F66 2.0T B48 OPF/GPF 24+.
Is it road legal?
Some versions are EC approved; check the EC Approved line in the specification for the option you choose.
Do I need a remap?
No. It fits behind the factory particulate filter, so no software changes are needed.
Does it keep the factory particulate filter?
Yes. It fits behind the factory particulate filter, 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.
