I can answer my own question. Manifold was manufactured by Thompson Foundry Ltd. Surrey, B.C. Canada. They still have them in stock for both sd22 and sd33 engines. Contact 1 604 596 9611 or [email protected].
I have a marine version of Nissan sd22, Type 14 E, serial number 404326. I need a Water cooled exhaust tank/manifold. Can anyone put me in contact with someone having one or a company still making one. My present location is Penang, Malaysia.