S&S Cycle Chain Drive Cams 585C Twin Cam/Dyna High performance cams Includes cams, gaskets, bearings and installation instructions Made in USA 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