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
Experience the raw sound of the BMW F80 M3 at its most dramatic with this Milltek Sport Equal Length Cat-Back Exhaust System. Designed for non-OPF/GPF F80 M3 models, the equal-length configuration is the loudest option in the Milltek Sport F80 M3 cat-back range — delivering a high-pitched, motorsport-inspired exhaust note that fully exploits the character of the S55 twin-turbo inline-six engine.
Using equal-length pipework ensures that both turbocharger outlets contribute equally to the exhaust soundtrack, creating a more balanced and intense note than a standard configuration. A race product designed for track use and spirited road driving. Available in five tip finishes. Manufactured from 304L stainless steel in the UK.
Fitment: BMW M3 F80 (Non-OPF/GPF models) 2014–2018
Race product: Yes (Loudest configuration)
Tip options: Polished, Cerakote Black, Titanium, Burnt Titanium, Carbon Fibre