Has anyone ever tried this thing? Is this as restrictive as the OEM pre cat? I'm planning to get this unless someone has other good ideas. I've done some searches on here but I don't think I found anything on this cat.

The reason why I'm even considering this is because the smog place that I have been going to for years decided to flag my car as modified recently and now everyone very strict on my car because of that. My car can pass the sniffer with no issues but it doesn't pass the visual and that's why my car was flagged. I don't want spend the money on an OEM pre cat because it just sucks, I don't want to spend all that time installing it and removing it just to smog my car, and I don't have room to store it.