Want to lower the rear of your classic Chevy C10 or GMC truck? These rear lowering shackles from Crown Suspension let you drop your ride by either 1 inch or 2 inches, depending on how you install them. They fit 1973-1987 C10 and GMC trucks in both 2WD and 4WD configurations. Made in the USA with a durable powder-coated finish and backed by a lifetime warranty. Part number is 511120. Installing shackles is one of the simplest ways to lower your truck for a sleeker look and better handling. Perfect for street trucks, custom builds, or just getting that perfect stance. Whether you're going for a mild drop or something more noticeable, these shackles are a straightforward upgrade. Get that low-and-slow vibe going!