OTM Spec Guide's

Build smarter, not harder.
OTM Spec Guides are written from real track experience — designed to help BMW owners upgrade, drift, and maintain their cars the right way. Whether you’re planning an angle kit, drivetrain upgrade, M50 swap, or full drift build, our guides walk you through every step using proven setups we run ourselves.

Learn what works, what breaks, and how to build your car safely — while saving money and avoiding common mistakes.