Need some advice. Want to increase volume of my GT500 axle backs. Interested at boss quad exhaust but resonator deletes is the cheaper option..

Where are the resonators located? Would installing the boss quad exhausts make the resonator deletes pointless?

 

You can't miss them if you look under the car, toward the front. They are two tubes, @22" in length that buldge off the pipe, and are welded in. They sort of look like in-line mufflers, but are not much fatter than the stock pipe, which I beleive is 2.75". Problem is, internally, they go down to less than 2.5" in spots. One of them is crimped on the bottom too, from the factory for clearance. If you google/yahoo "2011 Mustang gt reosnators" some clear pics come up.

Once off, my Gt500's sounded MUCH different. It is not as subtle as some suggest. Much louder/deeper under throttle, and all that burble on the over-revs. I had a guy drive mine afterward, and from outside the car, it seemd twice as loud as it was prior. I had 2.75" stainless welded in. $170

Worth every penny.

 

They are located forward of the rear axle. Use 3" pipe. See my TMS post for pictures and video:
https://themustangsource.com/f800/re...-video-513738/
Love the sound. Hope this helps you!