Corsa extreme axle back for 11-14 Mustang GT for sale. I purchased them from American Muscle on Dec. 27,2015 and They have been on the car for less than a week. Only selling because they were not the sound I was hoping for. The tips have a few scratches from me being a idiot when I put them on and took them off lol. Can send pictures to your phone if your interested. Asking $550 and you pay shipping. Thanks.