Universal Parts 164-168 GY6 Intake Manifold Insulator Intake Manifold Insulator Spacer for 150cc and 125cc GY6 4-stroke QMI152/157 and 150cc GY6B 4-stroke ZNEN engines commonly found in Lance Phoenix, Flyscooters Cadenza, ZNEN ZN150T-18, Xingyue ITA-150, Motorino Cassini, CMS Prodigy, BMS Pathfinder and many more. Smooth on both sides, no o-ring Bolt Hole Spacing: 45mm Inner Diameter: 23mm