What type of exhaust mufflerscome stock on a 2003 mach 1? Because i bought one at the first of the year, and the person that owned it before said it was stock but when me and a couple of my friends got to looking the mufflers underneath the car said borla. I was just wanting to make sure these were aftermarket and not some cheap ones that were put on from the factory.

 

Borla is an aftermarket exhaust... its also one of the more expensive brands out there. They also happen to be my personal favorite, b/c they sound sick with the right mid pipe set up.