I had them replace my catalytic converter. Everything was fine until a few months later, my engine light came on. I took it to Autozone and OReillys and they both did an engine code check and the results were the same, the catalytic converter was the issue. I then got a second opinion and I found out they used an old catalytic converter! They took advantage of me and I wont be going there anymore.
Great custom muffler much cheaper than anywhere else in town.