Is the 1992 Formula front air dam, this is the firebird model without the other ground effects different than the base firebirds, trans ams, or gtas of 1992? Or is just the center dam different with the 2 slots cut in it on the driver side of the dam and the 2 side pieces the same as the others models? Is this air dam and 2 side pieces unique to only the formulas? I need these 3 pieces in nos condition if anybody has them. And by the way does anybody know why the slots are cut in the center air dam on the driver's side?