What he said. Of course, you can always go ghetto and cut the muffler off. The positive: Its cheap and loud. The negative: People will think your truck is powered by a pack of angry bees that are all farting in sequence like sports fans doing the wave.
I run a header no cat straight pipe to an empty magna flow muffler 2 1/4 inch pipe out the back it sounds awful and pops and spits when off the gas extremely loud .but I don't drive my truck on the street a lot . Just a warning it gets kinda old on the street with a loud exhaust . Unless u have a big block chevelle that has balls to back its bark . But toxicstoyz is right a 44 or 10 will get you there
my exhaust was stock from header to cat, then after cat was just straight pipes gradually increasing in diameter - just pipes from autozone welded together. it sounded really good actually heh
