[quote author=davidathans link=board=1;threadid=1620;start=0#msg9834 date=1114554607]
For the person interested in building an exhaust system for their mustang, i would recommend magnaflow mufflers over flowmasters. As far as 2.25 or 2.5" pipes, it really depends on how much horsepower you are making, in my case im making 400 horsepower so i needed the extra diameter, im not sure if you would want 2.5" pipes on a stock 289. But i will say that the magnaflow mufflers are a little nicer because they are a little quieter than the flowmasters.
David
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I like the setup you mentioned (2.25" - 2.5"), H or X pipe is good, and I've heard a lot of good things about Magnaflow. I also heard that FM has the original 40 series, super 40, and the delta-flow 40 (the order denotes loud to less loud).
Are Magnaflows "long-lasting" (filler material burning out, or rusting out) and how's their pricing?