Turbo-4® is a registered trademarks of Pro-Fusion Technologies. Diamond Ground Products is in no way affiliated with Pro-Fusion® Technologies or their brand names. We supply high quality replacement parts manufactured by or for Diamond Ground Products to demanding specifications. The parts are engineered to be interchangeable with Pro-Fusion® parts, are not OEM parts and are not endorsed by Pro-Fusion®. References to the named machines, model numbers or part numbers are for your convenience only.