CP Pistons Harley ShovelHead, 80 cu in, 3.503 Bore, 4.250 Stroke, 9.5:1

CP Pistons 17-22 Harley Milwaukee Eight 143 ci, 4.500in Bore, 4.500in Stroke, 11.0:1 CR, 1.080in CH

CP Pistons Harley Twin Cam, 103 cu in, 3.875 Bore, 4.375 Stroke, 7.667 rod, 10.75:1 CR, 85cc Head