Athena P400270160003 Top End Gasket Kit Fits: Athena big bore cylinder kit for KTM SX250F 2006-2010 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