Stock air filter cover?

[RICKYRJ1]

Sorry guys I wasn't sure how to title my question. I bought my car w/ the Vortex air filter system already installed. As per everybodies comments I removed it and installed the stock one. MY Q. is the blk. plastic shroud that the filter housing lays on then scewed down w/the 3 round fasteners has a big hole cut out of it from the Vortex system. Is this a problem? Should a new shroud be installed? I also have one of the stock air filter housing that has been modified to make it a open system w/ K&N filter totally exposed. Should I use that one instead? Again sorry for the maybe not so clear Q.