it seem to me that most of you people are putting the borla on and not happy with the sound! the crossfire comes with 4 cats to with oxygen sensors and to in the back has anyone unbolted the two rear cats and gutted them out i know the one side has a flange and the other had to be cut then welded again but it would improve the sound and performance greatly and you would still have to cats left on the crossfire for back pressure and the performance of the oxygen sensors even taking the two center cats off with stock exhaust is a great sound improvement!

p.s there's also a place that makes power pullys for our 6v ill be getting them soon and let you know about the performance and the sound of the exhaust if i redo that!