Sulastic Rubber Springs SA-Models are designed to replace the original shackle of the Leaf-Spring Suspension when the shackle is under extension when applying load to the vehicle.
Installed on	Rear Axle with Leaf-Spring Suspension
Part(s) Replaced	OEM Shackle
Kit or Single Part	Kit per axle
Installation type	Screw-on (Some applications may require modifications to the vehicle)
Installation time. (Estimated with all pieces, tools, and experienced installers)	1-2 Hours
Truck’s Height Modification	Keeps the height between ¼”
Truck’s Load Capacities Modification	None
Installation Guide and Warranty	Version (March 2020-Current) Click here to Download the PDF   Removing Shackle Lower Bolt Video (Click Here)
Warranty	Version (March 2020-Current) Click here to Download the PDF
Previous Versions of Installation Guides and Warranties	Installation Guide and Warranty (Version May 2011 to Feb 2020)  ( English | Español) ******** Installation Guide Warranty Version ( 2006 to April 2011)  (English) *******  Warranty Version ( 2006 to April 2011)  (English/Spanish)