These chilled iron tappets have average face hardness RC 62 to work with chilled iron camshafts and a narrow edge chamfer to accommodate high velocity lobe profiles such as GP2 and GP3. The face is ground flat for proper operation and wear. An oil drain hole in the side aids lubrication of the face.
Good Parts recommends always replacing the tappets when replacing a camshaft.
Price is per each tappet.