Exhaust manifold & muffler

"Yanmar has two available exhaust manifolds. One is a gooseneck type that comes straight off the back of the engine. This will not fit on a MkI. The other comes straight off the back but does not have the gooseneck. I didn't like this option as I was concerned with syphoning. "I made my own gooseneck from stainless steel Sch. 10 elbows and hose barb fitting. Please note the water injection tube, This extends into the manifold about 4 inches or to where the hose connects on." [Starboard side view]