Milltek Filter-back Exhaust for INEOS Grenadier B57 3.0 I6 Turbo Diesel (2023 onwards) – Sharper Sound, Filter Retained
This is Milltek's particulate filter-back system for the INEOS Grenadier B57 3.0 I6 Turbo Diesel. 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 non-resonated or resonated versions and 7 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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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
- 76.2mm (3") pipework
- Fits behind the factory particulate filter, which stays in place
- Choice of 7 tailpipe finishes: GT-90 Brushed Titanium, GT-90 Burnt Titanium, GT-90 Cerakote Black, GT-90 Polished, JET-90 Carbon Fibre, GT-90 Premium Cerakote Black, GT-90 Premium Polished
- Resonated (quieter) or non-resonated (louder) versions
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- INEOS Grenadier B57 3.0 I6 Turbo Diesel (2023 onwards)
- INEOS Grenadier B58 3.0 I6 Turbo Petrol (2023 onwards)
Not suitable for: any model, engine or body style not listed above. Check your car before ordering.
Installation
The fitting time varies by version; see the specification table for the option you choose. Some versions: Non-Resonated System with GT-90 Brushed Titanium Tips (OE Requires cutting). Some versions: Non-Resonated System with GT-90 Burnt/Blue Titanium Tips (OE Requires cutting). Some versions: Non-Resonated System with GT-90 Cerakote Black Tips (OE Requires cutting). Some versions: Non-Resonated System with GT-90 Polished Tips (OE Requires cutting). 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.
Which tailpipe finishes are available?
You can choose from: GT-90 Brushed Titanium, GT-90 Burnt Titanium, GT-90 Cerakote Black, GT-90 Polished, JET-90 Carbon Fibre, GT-90 Premium Cerakote Black, GT-90 Premium Polished. The finish is cosmetic and does not change the sound.
Will it fit the INEOS Grenadier B58 3.0 I6 Turbo Petrol?
Yes. Milltek lists this part for the INEOS Grenadier B58 3.0 I6 Turbo Petrol 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 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.
How long does it take to fit?
It depends on the version. Milltek's fitting time for each option is shown in its specification table.
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.
