I bought a catalytic converter from these guys. I ordered the wrong one. I called and changed my order. They changed it. They delivered the converter. It turned out that I had California Emissions on my car, so the Federal Emissions converter I ordered would not work. Then I found out that my car was still under warranty for a new converter. Two months had gone by. I was too embarrassed to call them back. My wife called. They said no problem, we'll take it back. So I sent it to them and they gave me a full refund. All the while, their customer service people were polite and trying to take care of us. They could easily have refused to take the part back, but they took it anyway. So: you can order from these guys with confidence. They are a respectable outfit.