Top End Gasket Set - PolarisCaracteristicas: Top end gasket kits include correct base, head gasket and cylinder O rings as well as other top end specific O rings or seals needed for R&R of top end MLS head gaskets promote an even torque load across the gasket sealing surface, providing less bore distortion and better piston ring seal for more power 4 stroke head gaskets are made to perform on todays highest output 4 stroke naturally aspirated and boosted machines, utilizing a