Stillen DiffuserStillen offers its polyurethane rear diffuser for the 2013-15 Nissan Altima. Designed and manufactured in the United States at Stillen headquarters in Costa Mesa, California, this durable, urethane diffuser is available unpainted or in a matte black painted finish. It comes complete with double-sided trim adhesive, adhesive promoter and screws. Stillen claims its proprietary polyurethane formula to be strong and resilient enough for the manufacturer to offer a limited lifetime warranty on the materials. The Stillen
diffuser enhances the Altima’s existing body
lines for a subtle yet aggressive appearance.