If u r looking to save $, get u a pair of hi flow cats, have an exhaust shop cut the 2 front cats off and replace the rears with the hi flows. Then pick up a dual in dual out single magnaflow muffler and have it welded it at the same time. Unless u really care about having shiny pipes, no reason to spend $700 on just a cat back. The above procedure is what I had done on my truck. I had maybe $450 total in the exhaust and that is including the price of the muffler and the cats. That setup sounds awesome in my opinion. I ended up going expensive and I had to buy a bassani mid pipe because the flanges on my old stock exhaust setup were jacked up and started leaking after while. If not I would still have the above setup.