TS550 Camshafts Higher valve lift and more duration means power from 2000–6000 RPM, stock or modified engines, use with Stock Springs

15-19 Indian Bagger / 20 Chieftain / 20-21 Springfield / 20 Chieftain Classic / 21 Springfield Dark Horse / 22 Springfield / 13-19 Indian Cruiser / 20-21 Chief Vintage / 20 Chief Dark Horse / 23 Chief / 23 Chief Bobber / 15-19 Indian Touring