Racing Head Service (RHS) was founded in 1967 as a manufacturer of racing cylinder heads and quickly established itself as an iconic brand on the drag racing and circle track circuits. A member of the COMP Performance Group, Racing Head Service (RHS) combines its cutting-edge airflow technology with valvetrain knowledge from COMP Cams engineers to create some of the high-flowing, best-performing cylinder heads on the market. Plus, Racing Head Service offers engine blocks, valvetrain components, cylinder head gaskets and hardware, and more.