Detroit Speed QuadraLink Rear Suspension Kit - Base ShocksThis is a great way to upgrade from original leaf spring suspension. Unlike our competitors, Detroit Speed's exclusive new 4 link geometry design is uncompromised to achieve the best possible handling. The Detroit Speed "Swivel Link" (Patent No. 7,398,984) allows the suspension to fully articulate with smooth solid motion an no binding. The best feature is that this is achieved without heim joints. Heim joints are noisy and prone to short term life.