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 performance, reliability, and engine bay aesthetics with the MMX high-flow chargepipe kit for your BMW M2 Competition, M3, or M4 with the S55 engine.
The factory plastic chargepipes are prone to cracking under increased boost—often leading to boost leaks. The MMX kit replaces them with lightweight, mandrel-bent aluminum pipes for long-term durability, even at high power levels.
CFD-optimized for improved airflow, the smooth-bore design maintains a consistent diameter—unlike the flattened OEM pipes—enhancing throttle response and power. Rigid construction also eliminates deformation under load or vacuum.
Finished in a durable crinkle black coating with laser-etched MMX branding, these chargepipes offer a clean, OEM+ look and are a direct-fit replacement for stock parts.
Complete kit
Improve reliability, throttle response and power output
Included seals for precise and consitent connections
1/8" bung for the easy addition of methanol or water injection
