24.5 mm inside diameter gasket for used in many applications of ATVs, dirt bikes, go karts, and gas powered street scooters Applications vary and can be used for intake or exhaustDescription 24.5 mm inside diameter gasket for used in many applications of ATVs, dirt bikes, go karts, and gas powered street scooters. Applications vary and can be used for intake or exhaust.Check detailed specification dimensions prior to ordering. ? WARNING California Residents: Proposition 65 Warning Specifications Center Hole Diameter: 24.5 mmMounting Hole Diamter: 6.5 mmMounting Hole Distance: 45 mm center to center