QuadBoss 04-05 Polaris ATP 500 4x4 Water Pump Mechanical SealThe QuadBoss Water Pump Mechanical Seals are direct O. E. M. replacements at a fraction of the cost. Features high quality seal face material that performs better, combined with corrosion and chemical resistant materials that keep the engine cleaner, safer and cooler. This Part Fits: Year Make Model Submodel 1998 1999 Polaris Big Boss 500 6x6 Base 1995 1998 Polaris Magnum 425 2x4 Base 1995 1998 Polaris Magnum 425 4x4 Base 2002 Polaris Magnum 500 2x4