This is the genuine Subaru STI lip spoiler that was standard-issue on the 2007 STI Limited. Installation is simple -- after having it painted at your local body shop, have them adhere it to the trunk lid using 3M high-strength double-sided body tape. (Have them trim off the small locating studs on the underside of the wing.)
Fits all 2002-2007 Impreza/WRX/STI sedans. Note that if you are removing another WRX or STI wing, there WILL be holes left over. This wing will not cover those holes.