Transmission Performance
Circle D Specialties
Performance torque-converter and transmission solutions for street cars, strip cars, and higher-power builds.
Drivetrain Matching
Match the Converter to the Build
Circle D Specialties products can be considered when planning a performance drivetrain. Converter selection should account for engine torque, camshaft, vehicle weight, rear gearing, tire size, transmission, and how the vehicle will be used.
Share your vehicle and combination with Hillside Audio so we can discuss the right direction and confirm fitment details before parts are ordered.
Explore Performance WorkUpgrading Your Drivetrain?
Let’s match the parts to your engine, transmission, and goals.