This is a brand new machined 2" aluminum carb spacer for Stromberg 97 and Holley 94 patterns and will fit all three bolt carbs. It was specifically designed to match the shape of the original Edelbrock and Weiand intakes but could be used on any 3 bolt intake. If you have any questions please email us or call 608-637-7167 at Dashman's Hot Rod & Speed Parts.