Sifton solid tapper kit includes 4 alloy pushrods 4 solid lifters with adjuster screw front and rear zinc lifter blocks with gaskets. Order correct lifter base screws in either (20) or (24) 1/4 inch pitch thread. *NOTE: Solid lifter kits for shovelheads utilize pandhead solid lifters with threaded adjusters. Pushrods have panhead shape plus size ball end for the solid lifter end and shovelhead shape plus size ball at head end (Top) as shown on photo. FITS 1966-1984 FL 1971-1984 FX 1979-1983 FLT 1982-1983 FXR ACCESSORIES 16-1728 - Pushrod Cover Clip Tool 16-0993 - Sifton Pushrod Adjustment Gauge 11-0599 - Solid Tappet Kit Chrome Finish REPLACEMENT 7506-4 - Solid Shovelhead Pushrod Set 10-0988 - Replica Zinc Plated Tappet Block Set 10-0770 - Sifton Standard Solid Tappet Assembly 15-1542 - V-Twin Tappet Base Gasket Kit