Sorry to bring up old post but I am unable to find an answer that is complete yet. To start off I just purchased a Used :worship:worship:worship 2006 GT Mustang with 38K miles with 5 Speed:worship:worship:worship The car has 93 octane tune, C&L Intake, Flowmaster exhaust catback system with...

Hi gang, been awhile since my last post but Ive been reading so I'm still here! Anyways I'm sure if I put in the search time I'd get my answer but I'm short on time so here is my question.... I have a lightly modded vehicle. Not really important. I'm thinking of switching from stock I think...