The whole nature of fiberglass parts make them require some fitting. Anyone who has ever made a fiberglass part from a mold knows that even if the prototype part you molded from may be perfect fit, the nature of molding, and pulling the part from the mold changes all this to a degree. Bottom line almost all fiberglass parts require some fitting to get right. The Moss front fiberglass Sebring valance is some what of challenge to mount, it has to flex/stress mounted and take a bit of pushing in on the very ends. Tony Jennes make a front Sebring style valance as well, but from made from polyurethane,and it is made to flush mont for those running bumper-less, but can be used with bumpers, as well