S&S 555 cams for 1986-'90 HD® Sportster® models. Recommended for 89"-100" engines with 9.5:1 to 11.5:1 compression ratio. Provides best performance from 3500-6500 rpm using ported stock heads or S&S heads. Requires adjustable pushrods, spring spacing or high lift valve springs, and normal clearance checks.
Not legal for sale or use on CA or EPA pollution controlled motorcycles.