The Detroit Speed QUADRALink for 1973-87 Chevrolet C10 and GMC C15 is a great way to upgrade from a trailing arm rear suspension. Detroit Speed’s exclusive 4-link geometry design is uncompromised and designed to achieve the best possible handling during all conditions. The patented “Swivel-Link” technology combined with tuned high-durometer rubber bushings allow the suspension to fully articulate with smooth, silent motion.