I am using the Header that comes with the engine. The header is a 180deg design. The engine exhaust port is on the back (away from the prop) and the header curves around the left side. It's approx 4" in length.
One person mentioned shorting and extending the pipe to tune. After you cut the...
I am building a Prather deep vee 31" boat with an O.S. .21 rg-mx. I want to use a Prather 9010 tuned pipe with the engine. The boat instruction manual says I should have 8.25" from the glow plug to the pipe cone. But my problem is that the pipe instructions say to measure from the exhaust flange...
