[sammyg2]

On a stock engine does an aftermarket exhaust system really make much difference besides noise? I realize on a highly modified engine the stock system would be restrictive, but my impression is that the stock system works pretty darned good, so it's hard to justify big $$$ to change it unless the engine is built. On a full race engine the heater is not usually a big deal. That's just my feeling and not backed by any data, am I way off base here?