These C6 ZR1 Corvette side vent overlays are made of T304 stainless steel that has been laser cut with a diamond pattern. These side vents simply stick on top of factory side vents. No modifications required, easy peel and stick installation. These side grills will fit 2009-2012 C6 ZR1 Corvettes only. Sold as a 4 piece set. These side grills will never fade, rust, pit or tarnish. Manufactured by American Car Craft and made in the USA.