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
For the most dramatic exhaust upgrade on your BMW M235i (F22, non xDrive), the Milltek Sport Non-Resonated Cat-Back Race Exhaust System delivers maximum acoustic presence. By removing the factory resonator, this system produces a louder, more uninhibited exhaust note that makes the most of the M235i's turbocharged engine — ideal for track use and drivers who want the strongest possible sound transformation.
A bolt-on replacement for the OEM cat-back section, available in three tip finishes. Works with existing downpipe and catalysts — no cutting, welding, or ECU remapping required. Manufactured from 304L stainless steel in the UK.
Fitment: BMW M235i F22 (Non xDrive only)
Race product: Yes
Tip options: Polished (SSXBM989), Cerakote Black (SSXBM990), Titanium (SSXBM1029)
