[Backtobasics]

I am a firm believer in exhaust efficiency. I have seen may stock exhaust manifolds, and they scream restriction. I can't begin to see how a moderate tubular header, monolith / honeycomb style converter, and low restriction muffler can NOT benefit MPG. While it may move TQ a bit, from a sheer restriction point of outgoing exhaust, the above items have to be more efficient, offering lower restriction, and there for requiring less power to PUSH the exhaust out of the cylinder.