Installed DK #596407 on an 06 Moto Guzzi Breva v1100. Wanted a set of heated grips for the Guzzi but did not want to pay out the nose for the factory add-on grips. Purchased these grips that have centers cut out for bar weights and wired them into the factory heated grip system within a few hours not counting overnight curing of epoxy. The Breva's internal controller provides three heat levels vs. the kits 2 levels. These grips have a larger outside diameter than factory grips, which I like as they fit my hands better now and cause less fatigue.