Skyjacker leaf springs specified for a 4" Cummins diesel lift system with a 6" rear component as listed in the product details. These leaf springs are part of Skyjacker's lift offerings intended to change ride height and clearance for Cummins diesel applications while supporting the overall suspension kit characteristics of maintained ride quality and improved handling. The listing notes other parts may be required and references a limited lifetime warranty.
Skyjacker 4" CUMMINS DIESEL SYS W/6"R