There's no double wall on the coupe, cats fit fine bracket that bolts to center brace will have to be drilled out a little longer . Cats end up a little too far apart to bolt to bracket without slotting or redrilling the holes they sound great with stock coupe exhaust.

 

i second your opinion ghostg. i just got mine installed tonight and the growl is much meaner. sounds great. all i have is the pop charger/ z tube combo and when i rev over 3500 the exhaust is very noticeable as well as the gains. i like it alot.