The easy-to-use, custom design of the new COMP Cams Valve Spring Compressor for LS Engines enables the effortless removal of either one or two valve springs at a time, without the hassle of first having to remove the Rocker stand or any of the other installed Rockers. The tool works on all GM Gen III/IV LS-type engines, both with cylinder heads installed or with the cylinder heads off. The simple design facilitates easy usage in vehicles where other tools are incapable of reaching the tight spaces. This innovative Valve Spring Compressor is a must have for all LS engine builders and enthusiasts.