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Is it the heater core? it goes around the exhaust just like the old VW bugs.


No, it's a jacketed marine exhaust manifold - cooling water runs through it. From the rusty appearance I'd guess it to be a raw water cooled engine (cooling water is drawn through the hull, circulated through the engine and out the exhaust) as opposed to a freshwater (closed/recirculating/heat exchanger) system.

Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum