Bilstein is at the top of the heap in shock technology world wide. Their nitrogen filled separate chamber technology has been the standard of the shock industry for years. It was only a short time ago that the technology was allowed to be duplicated. LG has used these Aluminum Body Bilstein Shocks as the core of our Coil Over package for years now. The valving was dialed in by Lou and Bilstein shock engineers on the track and on the street. LG Built valving for street cars and for the race car. LG Motorsports Corvette Coil Over package uses the best and highest quality Hypercoil springs.