Athena P400427600001 Top End Gasket Kit Fits: Polaris 250 Big Boss 4X6 1990-1992, 250 Big Boss 6X6 1991-1993, 250 cc 1985-2006, 250 Cyclone 1987, 250 Trail Blazer 1990-2006 Athena top end gasket kits feature superior quality gaskets, containing the gaskets needed to rebuild your motorcycle or ATV engine Athena ensures they are only using the highest quality gaskets to provide a great seal every time Manufactured in state-of-the-art computer controlled facilities, Athena gaskets are designed and built to meet or exceed OEM specifications Athena is the OEM supplier to 60 percent of European manufacturers