HD PARTS since founded in 1997, we have focused on developing and manufacturing quality engine parts for the past 20 years. our engineer has more than 30 years of experience to make the drawing and control the whole production. we are developed to research, production of engine piston ring, engine piston, engine valve, engine bearing, engine cylinder liner, Ignition Coil, become one the specialized  supply with full ranges of applications for virtually any engine - racing, automotive, heavy-duty transportation, agriculture, industrial, small engine, and more. We shall continue to work to establish a better engine parts management systems.