CYLINDER HEAD ASSY.with gasket 420578 Product DescriptionCYLINDER HEAD ASSY.with gasket 420578Product InformationFits to model (7)TillersHUSQVARNA TF224HUSQVARNA TR 314CHUSQVARNA TR 317CHUSQVARNA TR 317DHUSQVARNA TR 317DESnow BlowersHUSQVARNA ST 131HUSQVARNA ST 151