Our Corvette lowering kits include new replacement spring bolts and polyurethane cushions. Our new lowering bolts eliminate the need to cut any material from your original bolts (saving installation time) and allow you to use the correct factory size bolts in all 4 corners of your suspension. The polyurethane cushions were custom designed for your C7 Corvette's suspension. The top surface is NOT flat like factory rubber bushing. Flat polyurethane bushings will bind as the suspension actuates causing the bushing to tear The bushings are designed with a convex radius that allows the bushing to slide as the control arms pivot. Our bushings are also designed to snap over the spring bolt rather than being permanently attached - this design keeps the bushing from breaking away from the adjustment bolt as the suspension pivots. Our lowering kit will allow you to drop your C7 Corvette approximately 2" and you can keep your factory bolts in case you want to restore your Corvette's ride height later. Proudly manufactured in the USA. Requires disassembly of suspension for installation.