Milltek Filter-back Exhaust for Land Rover/Range Rover Defender 110 OCTA P635 (NC11 4.4 V8) (2025 onwards) – Sharper Sound, Filter Retained
This is Milltek's particulate filter-back system for the Land Rover/Range Rover Defender 110 OCTA P635 (NC11 4.4 V8). 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 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: 80mm (3.15")
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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
- 80mm (3.15") 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, Re-Use Black Trims
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- Land Rover/Range Rover Defender 110 OCTA P635 (NC11 4.4 V8) (2025 onwards)
Not suitable for: the Land Rover/Range Rover Defender 110 5.0 V8 425PS & 525PS (NAS Non-OPF/GPF Vehicles Only), which needs the Milltek Filter-back Exhaust Land Rover Defender 110 5.0 V8 425PS & 525PS OPF/GPF Vehicles 21+; the Land Rover/Range Rover Defender 130 5.0 V8 425PS & 500PS (NAS Non-OPF/GPF Vehicles Only), which needs the Milltek Filter-back Exhaust Land Rover Defender 130 5.0 V8 425PS & 525PS OPF/GPF Vehicles 23+; the Land Rover/Range Rover Defender 90 5.0 V8 425PS & 525PS (NAS Non-OPF/GPF Vehicles Only), which needs the Milltek Filter-back Exhaust Land Rover Defender 90 5.0 V8 425PS & 525PS OPF/GPF Vehicles 21+.
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.
Which tailpipe finishes are available?
You can choose from: GT-100 Brushed Titanium, GT-100 Burnt Titanium, GT-100 Cerakote Black, GT-100 Polished, Re-Use Black Trims. The finish is cosmetic and does not change the sound.
Does it fit the Land Rover/Range Rover Defender 110 5.0 V8 425PS & 525PS (NAS Non-OPF/GPF Vehicles Only)?
No. For that car, choose the Milltek Filter-back Exhaust Land Rover Defender 110 5.0 V8 425PS & 525PS OPF/GPF Vehicles 21+.
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.
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.
