Cams work well with fuel injection or carburetor models Run best with low restriction exhausts (1700-5200 rpm) Works well with carbs or fuel injection Bolt-in cam for more torque with stock compression Can be used with stock valve springs and tappets Similar to the EV-23 cam All Andrews gear-driven cams require four-gear set for installation (DS-199532 for 99-06 applications; 0925-0166 or 0925-0152 for 07-17 Twin Cam and 06 Dyna applications). Installer must check coil bind, valve-to-valve clearance and valve-to-piston clearance. 59G, 60G and 64G cams are for highly tuned engines and require the knowledge of an expert engine builder for proper setup and installation.. CAMS 57H 06 DYNA 07-17 TC