28mm Manifold Spacer Insulator Gasket Fit For Pit Dirt Bike Moped Scooter Motorcycle Engine Parts Fit For Pit Dirt Bike Moped Scooter 28mm Manifold Spacer Insulator Gasket isolation composite material blocks cylinder transfer to carburetor to avoid vapor Standard 28mm inner bore guarantees smooth air-fuel flow consistent engine power output Integrated sealing gasket vacuum leaks to stabilize idle throttle response molded mounting holes align with cylinder head carb flange for direct assembly Flexible shock-absorbing structure reduces engine vibration to carb loosening during off road riding