I know this is old post is a few months old, buy in case it helps anyone, I used Dual Tone recently for changing out my mid mufflers. They were a little more expensive than other quotes I had, but they seemed like they would do a more thorough job based on pics of others cars that had been there, and I was also looking for somewhere that had a drive-on ramp, which they did. They were happy to work with me on trying different combos for me to hear the sound. I brought them the replacement mid mufflers so I believe their hourly rate was higher than if I went with something through them. They also let me drive the car off the ramp which I was happy about - I didn't like the idea of someone else jumping in the car and revving the crap out of my car to hear the exhaust! Would use them again.