Andrews Products Inc AP-212267 A2 Grind Camshaft for Big Twin 78-84Description for Andrews A2 Grind Cam 212267 You will get more mid range and top end power for your street or drag bike These cams work with solid or hydraulic lifters, and the idle remains unaffected up to 6000 rpm with stock valve springs A2 Grind Cam Shovel bolt in (except 80 81) no head work More mid range and hi end power NOTE: On late 77 and later engines, the pitch diameter and the camshaft, pinion gear and breather valve gear was changed. These