These Quickee pushrods for 1999 - up Harley-Davidson® big twin and 1986 - up Sportster® can be both installed and removed easily. The S&S design permits a simple, trouble free installation that does not require removal of the gas tank, rocker assemblies, or even the rocker box cover! OEM pushrods may be cut to permit removal without rocker disassembly. The threaded adjuster screws into the pushrod until the threads disengage and the adjuster simply slides into the pushrod, making installation or removal a snap. Once the pushrod is installed and adjusted, the locknut prevents the adjuster from moving. Adjustable to accommodate all tappets and cam base circle diameters and engine heights. 1984-'99 style pushrods covers required.