Complete Gasket Kit (oil seals included), Evo Big Twin Softail/Dyna 1987-91

This gasket kit fits 3-1/2" cylinder bore engines.It includes all gaskets, o-rings and seals for a complete engine overhaul. This gasket kit is specifically developed for:Evolution Big Twin 89-91 (does not fit FLT, FXR) Head gaskets included in this kit are made of MotorGasket M0115, a material developed and produced by Athena. MotorGasket M0115 consists of a central layer of steel, with asbestos-free material composed of a high percentage of aramid fibers, inorganic inserts, and NBR rubber as a binder on the sides. M0115 has good resistance to mechanical and thermal stresses and adheres well to surfaces. It is resistant to oils, fuels, water-glycol mixtures, and corrosion. It is suitable for cylinder head gaskets in internal combustion engines, intake and exhaust manifolds, and other applications subjected to high mechanical and thermal stress. The base gaskets included in this kit are made of MotorGasket M0109, a material developed and produced by Athena. MotorGasket M0109 is a high-quality asbestos-free gasket material, consisting of a blend of mineral fibers, aramid fibers, and NBR rubber. It exhibits excellent sealing capabilities with gases and fluids, along with adaptability features, making it suitable for use under moderate pressures. Athena offers the widest range of replacement engine gaskets available on the market, boasting over 40 years of experience in the field. Athena’s gasket kits are entirely engineered in Italy with a strong base of internal know-how. Each piece is produced following strict parameters imposed by manufacturers and the use of latest generation lasers guarantees perfect cutting quality.Athena performs surface treatments to compensate irregularities and follows material stress relieving processes to improve sealing in the most critical areas. Why choose the complete engine gasket kit? Athena’s gaskets have low moisture absorption, highest mechanical resistance, resistance to oils and gasoline, resistance to high temperatures and pressures, easy removal. This kit includes all the gaskets and oil seals for a complete engine overhaul (oil seals included). Find the gasket that best suits your motorbike by consulting the compatibility tables.