4.9L i6 flowmaster currently
#1
#5
i've got mine dumped after the muffler(not stock, not sure what it is, very deep). not loud. i ran mine w/o a muffler for a month or two, it was ok. Going to try taking both cats off, putting one high-flo on, and getting a flow 40. got a 83 f100 w/ flows on it, sounds frickin awesome!! but....... no cats, and its a carb.