Should be 3 bolts on the back of the catalytic converter in a triangle pattern, One bolt is on top almost up against the frame and the bottom two are easily accesible, i found when installing my Cat-back on my Sedan which is an 09 same generation and very similar exhaust just mainly longer. if you remove those annoying rubber exhaust hangers and pull the exhaust down just slightly you should be able to get a ratchet in there, My top bolt for some reason was harder to break because i had already loosened the bottom 2 if the bolts are rusted then definitely replace the bolts as well, if the cat back system you bought did not come with bolts take one of the bolts to your local hardware store and match it up as close as possible.