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
Give your Porsche 987 Cayman S or Boxster S (Gen 1, 3.4L) a genuine acoustic upgrade with this Milltek Sport Cat-Back Exhaust System. Engineered specifically for Gen 1 987 models, this system replaces the factory cat-back section with high-quality 304L stainless steel pipework, delivering a richer, more characterful exhaust note that complements the naturally aspirated flat-six's inherent sound quality.
Available in two tip finish options and designed as a straightforward OEM replacement — no cutting, welding, or modifications required. Improves exhaust flow for a more rewarding acoustic experience throughout the rev range. Manufactured at Milltek Sport's UK factory.
Fitment: Porsche 987 Cayman S & Boxster S (3.4L) Gen 1
Tip options: Polished (SSXPO120), Cerakote Black (SSXPO121)
