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There's not a whole lot of stock Chevrolet left here. The thing to keep in mind is that all of these aftermarket parts do exactly the same things that the stock GM parts did at one time. The only real change in geometry is the bracket for the inner camber rod control arm. The other big difference is that all of the factory bushings have been replaced with either polyurethane or heim joints. There are two big advantages for all these parts. First, you can make adjustments very quickly. The parts also remove almost all of the compression that takes place with the factory bushings. Vette Brakes produces the stiffest polyurethane bushings and Energy Suspension has the softest polyurethane. I prefer the stiffer bushings on my track car.