Small Block Chevy Motor Mount Combo Bryke Racing Combo Kit includes both engine mounts and frame mounts Small Block Chevy Solid Engine Mounts: Inside to Inside width: 2.5" Bottom to Center bolt hole: 1.687" Frame Motor Mounts: Overall Length: 6-1/8" Overall Width: 2-3/8" Center to center bolt hole length: 5-1/8" Center to center bolt hole width one: 2-3/8" Center to center bolt hole width two: 1-3/4" Material: Steel