Which cat-back exhuast kit is the best? MAC or Flowmaster? I'm looking for a nice low rumble sound. The louder the better.

 

Neither of those are best. Visit the exhaust thread and decide what you like the best, there are tons of clips.

 

If you want loud get the SLP loudmouth kit, I've heard those on a few cobras and Mach 1's and they sound good and loud

 

+1 there is no "best" catback. they all sound different and different people like different sounds. go on youtube and you can find hundreds of sound clips of different exhaust setups. go with what you think sounds good. keep in mind the midpipes are gonna change the tones alot too

 

this thread wont be useful...best catback choicesare all based on opinion.

 

I like how he's choosing the "best" cat-back by which one is loudest not which one gives the best power lol