Quote:
Originally Posted by nemesis
mustangs up to 2004 use the same set up, and I can hardly call them old, as a matter of fact, I am using aftermarket muffler and a turn down on my 00 stang as of right now. Stock muffler was maybe 2lbs heavier, and stock tail pipe was another 3lbs or so. 5lbs wouldn't make a difference in a 3000lb car/truck
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That's why i said old ER
Did the turndown with the new muffler affect your mileage at all or did it stay the same?