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 exhaust upgrade on your BMW F80 M3 a step further with this Milltek Sport Cat-Back Race Exhaust System for non-OPF/GPF models. Louder and more aggressive than the EC-approved road system, this race configuration features a non-resonated design for a more uninhibited, track-focused exhaust character — making the most of the S55 twin-turbo engine's impressive acoustic potential.
A direct bolt-on replacement with no cutting or modifications required. Works with the OEM downpipe and catalysts. Available in four tip finish options. Designed for drivers who want the maximum sound from a cat-back system, particularly for track use. Manufactured from 304L stainless steel in the UK.
Fitment: BMW M3 F80 (Non-OPF/GPF models) 2014–2018
Race product: Yes
Tip options: Polished, Cerakote Black, Titanium, Carbon Fibre
