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
Designed for OPF/GPF-equipped BMW F80 M3 owners who want maximum exhaust sound, this Milltek Sport OPF/GPF-Back Race Exhaust System delivers a louder, more aggressive character than the standard EC-approved version. The non-resonated race configuration removes the factory resonator from the OPF/GPF-back section, allowing a more dramatic, uninhibited exhaust note that suits spirited driving and track use.
Retains the factory OPF/GPF for emissions compliance, but maximises sound character from that point rearwards. A direct bolt-on replacement — no cutting or modifications required. Available in five tip finishes. Manufactured from 304L stainless steel in the UK.
Fitment: BMW M3 F80 (OPF/GPF equipped models) 2014–2018
Race product: Yes
Tip options: Polished, Cerakote Black, Titanium, Burnt Titanium, Carbon Fibre
