webcoll wrote in part, "...Clearly it pays to err on the side of caution here. Staying with OEM parts is often the safest thing to do. However MAF failures have been fairly common here in the UK with the standard OEM filter fitted particularly on diesels so I'm not sure what's going on."
While I can see possible benefits from less restricted air flow on a race engine that is tuned for it, I see no advantage on a street engine. I agree with webcoll that oem parts or similar are usually safer than experimenting.