I have for sale a slightly used Stainless works retro 3in catback exhaust for a 11-14 mustang GT or 11-12 GT500. I had this system on the car for about 3k miles. The tips are in near perfect condition. The only reason I am selling is because I am selling my 2012 GT. This system sounds awesome. The added benefit is that it is modular. I ran without the tips and the rear mufflers and it sounded absolutely wicked. Asking $600 plus shipping. American muscle sells this for $874.99 new. I live in northern MD and am willing to meet up with the buyer within a reasonable distance to avoid shipping.