S&amp,S Cycle 585 Chain Drive Easy Start Cams 106-5233 High performance cams Includes cams, gaskets, bearings and installation instructions Kits include cams, bearings, gaskets and bolts Designed for 88in. to 103in. engines with compression reatios from 10 to 10:5:1 and 100in. and 107in. engines at 9.7:1 to 10.5:1 Intake Opening (degrees): 20