69-73 Mustang/Cougar: 351W, 71-73 Mustang/Cougar, 66-73 Fairlane, 68-73 Torino/Cyclone/Montego, 66-73 Ranchero, 66-67 Falcon, 66-69 Comet, 71-73 Comet: 260-302W, Tube Size 1.5", Collector Size 3"