Designed for better control under race conditions, this shackle kit with Del-a-lum bushings allows for less body roll during lateral loads, with smoother suspension movement throughout its entire range of motion. This is the best set up to use when slider spring mounts are not allowed. Constructed of heat treated aluminum and high impact nylon, they're also equipped with grease fittings for longevity. Anodized and plated for corrosion resistance. Fits AFTERMARKET springs. Staggered size eyes (1.420 id and 1.370 id )