HYGEAR
HYGEAR PR/SPRING SPACER SD SD SUMMIT REV #61-35-002-A
      PR/SPRING SPACER SD SD SUMMIT REV. The vendor part number is 61-35-002-A. Read title carefully to know what you are geting. Catalog decription… 
  - Adds preload and effective rate to rear torsion springs
 - Allows for more accurate ride height setup
 - Increases efficiency of rear torsion springs