Milltek Filter-back Exhaust for BMW X3 X3M/X3M Comp (G01) 3.0 (ROW & North American S58 Engine - LCI only) (2022 and Later) (2022 onwards) – Sharper Sound, Filter Retained
This is Milltek's particulate filter-back system for the BMW X4 X4M/X4M Comp (G02) 3.0 (with OPF/GPF S58 Engine - LCI only). 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
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Fitting Time: approx. 2 to 3 hours (Milltek figure)
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-115 Burnt Titanium, GT-115 Cerakote Black, GT-115 Polished, GT-115 Titanium, JET-115 Carbon Fibre
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- BMW X3 X3M/X3M Comp (G01) 3.0 (ROW & North American S58 Engine - LCI only) (2022 and Later) (2022 onwards)
- BMW X3 X3M/X3M Comp (G01) 3.0 (with OPF/GPF S58 Engine - LCI only) (2022 onwards)
- BMW X3 X3M/X3M Comp (G01) 3.0 (with OPF/GPF S58 Engine - Pre LCI only) (2019-2021)
- BMW X4 X4M/X4M Comp (G02) 3.0 (ROW & North American S58 Engine - LCI only) (2022 and Later) (2022 onwards)
- BMW X4 X4M/X4M Comp (G02) 3.0 (with OPF/GPF S58 Engine - LCI only) (2022 onwards)
Not suitable for: any model, engine or body style not listed above. Check your car before ordering.
Installation
Milltek quotes a fitting time of approx. 2 to 3 hours. Some versions: OPF/GPF Back System - GT-115 Burnt Titanium Trims (Needs x 2 F5168 adaptors if being fit to existing GPF delete). Some versions: OPF/GPF Back System - GT-115 Cerakote Black Trims (Needs x 2 F5168 adaptors if being fit to existing GPF delete). Some versions: OPF/GPF Back System - GT-115 Polished Trims (Needs x 2 F5168 adaptors if being fit to existing GPF delete). Some versions: OPF/GPF Back System - GT-115 Titanium Trims (Needs x 2 F5168 adaptors if being fit to existing GPF delete). 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 BMW X3 X3M & X3M Comp G01 3.0 (with OPF/GPF S58 Engine - LCI only) 22+, Milltek Secondary Catalyst Bypass BMW X4 X4M & X4M Comp G02 3.0 (ROW & North American S58 Engine - LCI only) 2022 & Later 22+.
Which tailpipe finishes are available?
You can choose from: GT-115 Burnt Titanium, GT-115 Cerakote Black, GT-115 Polished, GT-115 Titanium, JET-115 Carbon Fibre. The finish is cosmetic and does not change the sound.
Will it fit the BMW X3 X3M/X3M Comp (G01) 3.0 (with OPF/GPF S58 Engine - LCI only)?
Yes. Milltek lists this part for the BMW X3 X3M/X3M Comp (G01) 3.0 (with OPF/GPF S58 Engine - LCI only) 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?
Milltek quotes approx. 2 to 3 hours.
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.
