Depends on what you buy from them. Some stuff sucks and some does not.

Like someone said you just bought a shiny resonator. That is not a catalytic converter. You will not pass emissions with that.

I have an OBX header and muffler. The header has not cracked and looks good. I just got it for looks so didnt see why I needed to spend a ton more for name brand.

The muffler looks and sounds awesome. It doesnt have that pissed off bumble bee in a can sound. I ALWAYS get asked, "what muffler do you have? It sounds really good." It has a smooth deep tone to it.