Polaris RZR Parts For Sale XP4 900 Racer Tech Dual Rate Springs May 26, 2015 Set of RacerTech dual rate shock springs for all XP4 900’s with the 2.0" front and 2.5" rear Walker Evans shocks. They are $585 new from RacerTech $500 shipped or $450 local pick-up in so-cal. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related