For H-D 61 Inch 1948-1952. These U.S.A. made strong, lightweight pushrods are manufactured from the best materials obtainable regardless of cost. All parts are accurately machined, holding tolerances of as small as .0005 inch. All steel wear surfaces are CarboNitride heat treated for maximum durability and long life expectancy at high valve spring loads and high rpm. Sold as set (package of 4).