ZBROZ has delivered the best and most cost effective Suspension Spring Kit on the market! This is a DIY installation and will give you Race-Inspired Performance & Control for all types of riding; mountain trail, rock crawling, and desert/dune rally action! This Stage 1 Dual Rate Spring Kit for The RZR PRO R 4 Fox Dynamics is known to be the best single modification you can do to your RZR and will increase your ride height 1-2 inches! Improving your ride immensely, and improves your ability to deal with added weight of accessories! Also gaining more stability and better small & large bump dampening with this simple upgrade! This is a great upgrade to your RZR that you can install yourself, and you will be amazed at the more comfortable and smoother ride you will achieve from it! Upgrade your Polaris RZR PRO R 4 today with a ZBROZ Spring Kit and rip over washboard bumps and whoops with more comfort & ease than ever before! - Our Zbroz Suspension Kits generally ship out within 1-2 business day! - Fits: Polaris Pro R 4 Fox Dynamics Shocks : (2022-2023) - Gain back lost right height - Increases Ride Height by 1 to 2 Inches - Reduces Body Roll and Rear Bucking - High Tensile Light Weight Springs - Rear Billet Crossover Rings for Fine-Tuning - Increased Bottoming Resistance without Sacrificing Low-Speed Compliance - Manufacturer's part# K30-PL1031-0