String Theory Garage will be closed to the public from Wednesday, 29th July to Thursday, 6th August for our annual shutdown.
If you need to get in touch, please leave us a voicemail or send an email. Our team will happily get back to you when we return on Friday, 7th August.
Shopping online? Don't worry! Our online store will remain active! We hope to ship orders placed for in-stock items as normal during the shutdown. Anything else will be dealt with upon our return.
Thank you for your understanding, String Theory Garage Team
Take the soundtrack of your Porsche 718 Cayman GT4 or Boxster GTS (4.0L, PDK, Post-February 2020) to a whole new level with this Milltek Sport OPF-Back Exhaust System. Designed specifically for later PDK-equipped 4.0L naturally aspirated models, this system replaces the OPF-back pipework with free-flowing 304L stainless steel construction — transforming the exhaust note with a richer, more characterful sound whilst maintaining factory OPF emissions compliance.
Available in five tip finish options to suit your car's styling. Bolt-on OEM replacement with no cutting or welding required. Manufactured in the UK by Milltek Sport.
Fitment: Porsche 718 Cayman GT4 & Boxster GTS (4.0L, PDK) Post Feb 2020
Tip options: Polished (SSXPO189), Cerakote Black (SSXPO190), Titanium (SSXPO191), Burnt Titanium (SSXPO192), Carbon Fibre (SSXPO193)
