HAVE 13 GT WOULD LIKE TO CHANGE EXHAUST,BUT I WANT TO KEEP MT CATS,WOULD LIKE TO DO X PIPE AND MUFFLERS,DONT LIKE NOTHING RATTY SOUNDING,IM 51 YRS OLD I LIKE SOMETHING,WITH A NICE RAP,BUT NO DRONE AT ALL,AND DO YOU THINK EXHAUST ADDS MUCH AT ALL TO HP AND TORQ,ARE JUST BASICALLY FOR SOUND,HAVE ADDED A STEEDA CAI, SCT TUNER AND 373S CAR RUNS AWESOME ITS A AUTOMATIC AND I GET 2ND AND 3 RD GEAR SCRATCH LEAVING IT IN DRIVE WITH TRAC CONTROL ON,