Fit For Most 125cc 150cc,GY6 125cc 150cc 4 stroke Engine Scooters ATVs Kazuma Baja Kymco Tank,etcIntake Side inner Diameter : 1-9/16″ (26mm)Intake Side Outer Diameter :1-13/16″ (32mm)Air Filter Mount inner Diameter :2-3/16″ (38mm)Air Filter Mount Outer Diameter : 2-5/16″ (42mm)Fit For Most 125cc 150cc,GY6 125cc 150cc 4 stroke Engine Scooters ATVs Kazuma Baja Kymco Tank,etc Fit For all the motorcycle scooters with GY6 150-250CC engine. GY6 or GY6 Clone engine 150cc. 150cc Go Kart engine. 150cc Dune Buggie engine. 150cc Buggie engine. . . Baja. Kazuma. Jonway. Carroll Stream. Eagle. . Redcat. Tank. Giovanni. Aimex. Jackel. Wildfire. Xtreme. Seaseng. Qlink. Jcl. Size For Carburetor Carb: Intake Side inner Diameter : 1-9/16″ (26mm) Intake Side Outer Diameter :1-13/16″ (32mm) Air Filter Mount inner Diameter :2-3/16″ (38mm) Air Filter Mount Outer Diameter : 2-5/16″ (42mm) Size For the Intake Manifold Pipe: Engine mount inner diameter: 22mm Carburetor mount inner diameter: 30mm Bolting Hole D