Where do you live? The county you live in affects some of what gets tested. In major metros (Dallas, Travis, Harris, etc.) they do a sniffer that is more stringent than say out in BFE.
To be honest, I have *never* had issues, with either visual or sniffer testing, even in cases where I may been missing an emissions component, like say, a cat. Wait I take that back, I once had a dealer fail my Evo for having a test pipe. But even then, just swapped back and I was set.
Also I assume you're talking about an Elige? With modern EFI, and most credible aftermarket mods having a well integrated look, I would not worry at all about it.
Now, if you're talking about a G car Espirit with an engine swap running on a MS system, than I don't know.