So my question is, will the factory lip style spoiler fit on the back of the magnum? The link to the spoiler I was thinkin about puttin on the back of my mag is here: PRIMER CHRYSLER 300 05 06 07 FACTORY STYLE LIP SPOILER - eBay (item 170298725123 end time Dec-21-10 13:45:49 PST) Does anybody...