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
Specifically engineered for OPF/GPF-equipped BMW F80 M3 models, this Milltek Sport OPF/GPF-Back Exhaust System restores the exhaust character that the factory particulate filter works hard to suppress. Replacing the exhaust section from the OPF/GPF outlet rearwards, this system significantly improves the sound quality and tonality of the S55 engine whilst retaining the factory emissions hardware for everyday use.
A direct OEM replacement — bolt-on fitment with no modifications required. Available in five tip finishes. Manufactured from 304L stainless steel at Milltek Sport's UK factory. No ECU remap required, though the system will complement a Stage 2 tune perfectly.
Fitment: BMW M3 F80 (OPF/GPF equipped models) 2014–2018
E-marked: EC approved
Tip options: Polished, Cerakote Black, Titanium, Burnt Titanium, Carbon Fibre
