Seakamp SK4808 is designed for Mercruiser Chevy Based V6 4.3L engines, V8 engines 305 – 350 – 357 C.I.D. / 5.0 / 5.7L stern drives from 2002 thru 2006 that are carbureted, use the wet joint exhaust, and serpentine belt. Especially designed to take advantage of the low capacity raw water stern drive pumps used on stern drive engines. Heat exchanger has high efficiency four pass design. Extend the life of your engine while protecting it from corrosion with this easy to install, quality built, and uniquely designed heat exchanger cooling system.