Update: I just added a magnaflow 4 inch round muffler and 2.5 crush bend piping all the way back to another muffler that looks like the one in the picture. They are from vibrant exhaust. Got a little more grunt with a more free flowing exhaust. No more flattened piping. Will try to get some pics soon. So I have 2 vibrant mufflers and 1 magnaflow muffler. I just get a slight purr when driving normal and a medium growl when WOT.