Milltek Filter-back Exhaust for Porsche Boxster 718 GTS 2.5T (2016-2022) – Sharper Sound, Filter Retained
This is Milltek's particulate filter-back system for the Porsche Cayman 718 GTS 2.5T. 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: 63.5mm (2.5")
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EC Approved: No
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Race System: No
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Fitting Time: approx. 2 to 2.5 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
- 63.5mm (2.5") pipework
- Fits behind the factory particulate filter, which stays in place
- Choice of 5 tailpipe finishes: GT-100 Burnt Titanium, JET-100 Carbon Fibre, GT-100 Cerakote Black, GT-100 Polished, GT-100 Titanium
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- Porsche Boxster 718 GTS 2.5T (2016-2022)
- Porsche Cayman 718 GTS 2.5T (2016-2020)
Not suitable for: the Porsche Boxster 718 GTS & Spyder 4.0 (OPF/GPF Equipped Cars Only - Pre Feb 2020 build only), which needs the Milltek Filter-back Exhaust Porsche Boxster 718 GTS & Spyder 4.0 (OPF/GPF Equipped Cars Only - Pre Feb 2020 build only) 19-20 SSXPO167; the Porsche Boxster 718 GTS & Spyder 4.0 (OPF/GPF Equipped Cars Only - Post Feb 2020 build PDK Cars only), which needs the Milltek Filter-back Exhaust Porsche Boxster 718 GTS & Spyder 4.0 (OPF/GPF Equipped Cars Only - Post Feb 2020 build PDK Cars only) 20+ SSXPO191; the Porsche Boxster 718 GTS & Spyder 4.0 (OPF/GPF Equipped Cars Only - Post Feb 2020 build Manual Cars only), which needs the Milltek Filter-back Exhaust Porsche Boxster 718 GTS & Spyder 4.0 (OPF/GPF Equipped Cars Only - Post Feb 2020 build Manual Cars only) 20+ SSXPO159.
Installation
Milltek quotes a fitting time of approx. 2 to 2.5 hours. 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 Full Exhaust & Cat Bypass Porsche Boxster 718 GTS 2.5T 16-22.
Which tailpipe finishes are available?
You can choose from: GT-100 Burnt Titanium, JET-100 Carbon Fibre, GT-100 Cerakote Black, GT-100 Polished, GT-100 Titanium. The finish is cosmetic and does not change the sound.
Will it fit the Porsche Cayman 718 GTS 2.5T?
Yes. Milltek lists this part for the Porsche Cayman 718 GTS 2.5T as well as the other models in the fitment list above.
Does it fit the Porsche Boxster 718 GTS & Spyder 4.0 (OPF/GPF Equipped Cars Only - Pre Feb 2020 build only)?
No. For that car, choose the Milltek Filter-back Exhaust Porsche Boxster 718 GTS & Spyder 4.0 (OPF/GPF Equipped Cars Only - Pre Feb 2020 build only) 19-20 SSXPO167.
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 2.5 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.
