These Quickee pushrods for 1969-'99 HD big twin engines 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. Works with stock pushrod covers and Adjustable to work with all stock and aftermarket cams.Fits 1969-'84 74" and 103" HD big twin engines with S&S rocker arms and 1984-'99 107" and 111"engines. Will also fit V100 engines if they have cast tappets blocks. They will not fit V100 engines with our billet tappet blocks.