A Vintage G.E.M. brand go kart engine velocity stack. It is used so please look at the pics, some marks and a small bit of corrosion on the outer cone. Mounting holes are 1 3/4" center to center. Height of the velocity stack is 2 1/4" and diameter is 2 1/2" on the top of the cone and 1 1/2" on the bottom of the stack. Still a great vintage go kart part.