Hooker Cat-Back Exh. System was money well spent, i like them, has a nice drone sound to it, not too loud like the ATR System, notice a difference as well, can't go wrong with the price either, i think summit racing still has a good price on them, installation was easy, pretty much bolts right up into place, only thing i had to do was cut my old test pipe where it bolts to the down-pipe, use the flange and weld it to the new test pipe to it