Metric Mechanic Inc – BMW Performance Engines, Transmissions, Differentials & Custom Parts

Over 30 years experience modernizing the drivetrain through innovation, design & engineering, has earned us the reputation of being the BMW Drivetrain Experts

Office Hours 9-12 & 2-5 CST Mon-Fri
International Hours also available

Price Pages MiniClick Here to download or print our current Product & Price List



Metric Mechanic, a machine shop dedicated to enhancing the BMW drivetrain, powered by admiration for the BMW Brand, same as you!

MM customers are BMW enthusiasts seeking greater performance & reliability for the BMW they relate to so strongly. Our normally aspirated engine rebuilds provide 25% – 50% more HP & twice the longevity. We also build engines dedicated for boosting. MM 5 & 6 Speed Manual transmissions take harder shifting. Variable Limited Slip Differentials increase cornering speed plus last longer.

From Questions …

Since you’ve come to our website, you’re most likely a “hard core” BMW enthusiast in a long term relationship with your bimmer, looking to increase it’s performance. And you probably have questions, ideas or even a project in mind that you’d like to discuss.

… to Answers

Our best guidance is provided during a phone call where we can give & take together and cover more “ground”. You’ll speak with Jim Rowe, Teddy Rowe or Tyler Davis, technicians well versed in our products because they actually build them.

… and Delivery

Yes, we ship across the USA and Worldwide as well. MM can make all arrangements including the return of your cores. International customers? Before you decide that shipping will be too expensive, ask for a quote! You may be pleasantly surprised.

Ordering, Payment & Shipping Info

Most orders are placed over the phone or by email after a technical discussion. Payment method or down-payment secures the order. On longer jobs, deposits may be taken several times during the build. We accept Discover, American Express, Mastercard, Visa, Wire Transfer, PayPal, Certified Checks and Personal Checks in some situations. We ship packages via UPS, Federal Express and the US Post Office. Heavier shipments are scheduled through Conway Freight. Internationally, the best rates and service are with UPS Consolidated and FedEx International Economy. We schedule shipping product to you and also core returns. We also arrange for Auto Transport via open and closed trailers. Finally, free transportation “taxi service” is available to and from the St. Louis and Springfield Missouri airports. Metric Mechanic 505 East Main Street Richland MO 65556 USA

Contact us here or

Fill out my online form.