Evolution Powersports has produced two primary clutch springs for the Polaris RZR XP Turbo. The first is DARK BLUE – 40 LBS AT 2.25" AND 145 LBS AT 1.25". This will be a very good drag race spring due to the higher engagement preload and shift. These are in stock now and are $35.00. They will be up on our website this weekend. The second spring is RED – 15 LBS AT 2.25" AND 135 LBS AT 1.25". These should be in stock any day and will work well for most dune and trail riders looking to use heavier weights for tunes. These will be incorporated into other Evo clutch kits in the near future.