Top End Gasket Kit Sea-Doo 580 - 6440. Fits - Sea-Doo 587 engines. Includes: Head Cover O-Ring. Spark Plug O-Ring (2). Cylinder O-Ring (2). Water Jacket O-Ring (2). Base Gasket. Carb Gasket 38mm (2). Exhaust Gasket (2). Headpipe Gasket.