See more: Tappets
D. Fits Big Twin models 1948 thru 1984, must be installed with tappet screws and nuts that match your pushrods (OEM 18492-48), Big Axle +.005" oversize
Jims' American made solid tappet assemblies are made from aircraft quality American steel, precision machined, heat treated and ground to less than .0002" total indicator readings at a 16 finish. Available in standard or .005" oversize. The Big Axle tappets feature extra thick tappet rollers that have increased strength and won't deform when used in combination with High Lift Performance cams.