JDR offers a complete selection of custom built 4 BBL racing carburetors. These are available in sizes from 390 to 1400 CFM.

Every carburetor we build is matched to the customer’s engine package, rules, and the fuel being used. We offer gauge legal “stock appearing” carbs, to fully modified with billet aluminum or titanium components.

We can build them for almost any application, any set of rules, and calibrate them for specific brands/types of gasoline, methanol alcohol, ethanol alcohol and E-85 fuels.

If you’re looking for smooth power, throttle response and winning race track performance, we’ve got what you’re looking for!