Born from a Northeastern Ohio tool-and-die maker’s response to failing stock rocker arms in the 1950s, Harland Sharp manufactures aluminum roller-tip rocker arms and other valvetrain parts for racing engines. Still family-owned and operated, the Strongsville company makes every part in the USA, hand-inspects each rocker before shipment, and offers a lifetime guarantee against manufacturing defects. The business is now carried into its third generation while remaining focused exclusively on rocker-arm development and production.