10-10-2013, 06:07 AM
You've just answered my question then. I was gonna ask on my project whether it was necessary to buy a reducer for the exhaust elbow or get the 3" elbow welded straight onto the standard elbow flange that I will get from cutting off a standard elbow. That would result in the gases coming to an abruptly flat surface and smaller hole. Guess I won't be able to save a fiver on a reducer after all, not a problem really.