After years of testing, development and a decade on the market, RT Pro has proven to have the best replacement spring options for today’s UTV's. This kit is for the Polaris RZR XP4 Turbo (4 seat) using OEM FOX Internal Bypass shocks. This dual rate kit gives a substantial improvement in ride quality while improving handling and stability as well at G-out resistance. We've found the perfect combination of spring length to rate ratio and are very happy with our results. This kit is for all four corners of the machine. It provides a tender spring, main spring and dual crossover rings for all four shocks. Delrin adapter rings are also included for rear shocks to convert to 3.75” ID springs.
The spring kit alone can make a night and day difference in the performance of the RZR. This is enough of an improvement most recreational driver's will never need to make any other internal adjustments to the shocks and will be able to fine-tune the ride with the external adjustments provided on the OEM shocks. For the customers wanting more, contact Yokley Racing for custom valving. Note: RT Pro does not offer valving service nor do we handle the shocks for Yokley Racing. For revalving services please contact them directly!
The kit was designed to lower the car at minimal preload. At minimum, the car at OEM weight should sit around 11-12" measured from the bottom of the chassis. However, since there is so much adjustment available on this kit it’s easy to still maintain 13-14" of clearance by simply adding more preload. This kit will work for almost any RZR XP4 Turbo no matter the setup. If you have a very light machine you can run minimal preload. If your RZR is loaded down with accessories and cargo most often simply turn up the preload until you achieve the desired ride height.
We found there really only needed to be two rate kits needed for the 4 seat model. The medium rate kit works great for 2-4 people without a ton of extra gear loaded beyond what the average owner takes with them for a day on the trail or dunes. The heavy kits are recommended when carrying 4 people and a lot of gear most often.
This kit is 100% MADE IN THE U.S.A. and we at RT are VERY proud of this!
Kit includes (8) springs, (8) spring adapters and (8) crossover rings. All springs come with silver powdercoat.
"It's hard to say what's the best when you've only tried one. At RT Pro we believe we have the best spring replacement kit in the world and are willing to put our money where our mouth is. If you have a competitor’s spring kit and want to try ours, buy it. If you don't feel our springs are better than what you have you can send them back for a 100% refund."