Universal Parts 164-221 GY6 Intake Manifold Intake Manifold with 2 Vacuum Points for 150cc and 125cc GY6 4-stroke QMI152/157 and QMJ152/157 engines.Connects the carburetor to the cylinder head. Tip: This is a common failure part because it is the only mounting point for the carburetor and because of the material it's made from. Please be sure to always check your stock intake manifold for dry rot, rips and tears before riding. Please note: This intake manifold has two point vacuum feeds (see related items for the 1 point vacuum feed intak e manifold) Inner Diameter (head side): 22mmInner Diameter (carb mount): 30mm Bolt Hole Spacing: 45mm