Fits 2006-2013 C6 Corvette Z06s;Fits 2009-2013 C6 Corvette ZR1s;Fits 2014-2019 C7 Corvettes;Heavy-duty, zinc-plated steel studs;Durable, lightweight aluminum shims;Replaces the factory upper control arm bolts in the front and rear with studs to prevent wear on the frame from alignment changes;Eliminates wear on your Corvette's upper control arm frame inserts;Improves alignment adjustability with included shims;Available bare for a durable finish;3-4 hour installation time;Proudly designed in the USA!;Proudly made in the USA!