Fits 1997-2004 C5 Corvettes (including Z06);Fits 2005-2013 C6 Corvettes (including Z06 and ZR1);Heavy-duty, zinc-plated steel studs;Durable, lightweight aluminum shims;Replaces the factory front upper control arm bolts with studs to prevent wear on the frame from alignment changes;Eliminates wear on the front upper control arm frame inserts;Improves alignment adjustability with included shims;Available bare for a durable finish;1-2 hour installation time;Proudly designed in the USA!;Proudly made in the USA!