Adjustable Pushrods with Solid Lifter Adapters. Converts stock hydraulic lifters to solid, non-adjustable lifters. Includes all parts needed for converting to solid lifters: four adjustable steel pushrods and four non-adjustable lifter inserts that replace the stock hydraulic units. Includes adapters for converting 1953-'84 style hydraulic lifters to non-adjustable solids. Fits 1966-'84 HD® big twin models with 5.468 inch (+1/8 inch) cylinders.