Quote:
Originally Posted by chuckm
TANSTAAFL. Remember that your engine would then have to work harder to push exhaust gases out. That would translate into poorer mpgs, if not engine performance problems (exhaust not properly evacuated from the cylinders).
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Not necessary, I've lost couple of mpg with free flowing exhaust, which leads me to believe that the exhaust with more back pressure might get better gas mileage, I don't have any proof since I haven't done it personally, but it might work