EPI Performance Heavy Duty Front / Rear Suspension Spring Can-Am Outlander / Polaris Sportsman For those looking to enhance their ATV / UTV / Side-by-Side's performance, EPI Performance offers an upgraded spring rate solution. The high-quality chrome silicon springs are 25 heavier compared to OE stock springs, a feature that makes them perfect for supporting additional accessory weight. Features: Sold each 25 heavier than stock High quality chrome silicon Ideal for use with accessories that add weight (ex. plow, winch, cab, trailer etc.) Spring rate: 120