there is allot of after market companies for the g body car involved in circle track racing. it seems everything is WAY cheaper, from shocks to tubular a arms($51.00 per arm with a ball joint) all these cars are known as metric chassis and there seems to be more after market options through the circle track world. i just discovered this because my uncle has a custom race car fab. shop. i recently went there for my whole front end of my car, and it was way cheaper to run circle track stuff, which is the same as the the street stuff that you would get through summit and jegs.