Cummins Atlantic did the marinization
work on these, and most are
sold though TransAtlantic
Diesel in VA. TAD can supply the
parts, although you'll pay dearly for them!
It's just a Bowman Header Tank/Heat exchanger with an adaptor plate mounted to the cylinder
head, figure out the Bowman part number (I think it also fits some Perkins) and many places could order it. Or the Cummins part # is M41010 for the manifold/Heat exchanger/tank, if ordered though a Cummins Marine dealer.
Tube bundle #M42010
Good luck, grab your wallet! I just paid $20/unit for the exhaust gaskets x 4, or in other words $80 for an exhaust
gasket.
TAD
Engine/Parts National Watts Order Line: 800-927-9295
TEL: (804) 642-9295