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
Upgrade your BMW's ignition system with the MMX Performance High-Output Ignition Coil — a plug-and-play upgrade over the OE factory coils. Delivering greater energy output, these coils ensure a stronger and more consistent spark for improved combustion efficiency, sharper throttle response, and more complete fuel burn.
Particularly effective on tuned or higher-boost engines where factory coils may struggle to maintain ignition quality under increased cylinder pressure. Available in the original MMX blue or the premium red high-output variant — sold individually.
Key Features
Higher energy output vs OEM coils — stronger, more consistent spark
Plug-and-play installation — direct OE replacement
Improved combustion efficiency and throttle response
Ideal for tuned or high-boost builds
Available in blue or red variants
UK-engineered by MMX Performance
Vehicle Compatibility
BMW F8x M2 Competition, M3 (F80), M4 (F82/F83) — S55 engine BMW F2x M135i, M235i — N55 engine All BMW N55-engined F-Series models MINI Cooper S (F-Series)
