They installed my Spin-Tech directional muffler backwards. It was a brand and design they aren't familiar with, but insisted that they knew more about it than the manufacturer. They also ""did me a favor"" and switched my Jackson Racing catalytic converter for ""one with the right size inlet"" and didn't give me the option to buy the new one so I could keep my old one. Chances are that the one they put in is lower quality.
Pros: confident
Cons: overconfident
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