Features 1,Part Number: According to the original factory specifications, replacing reference OEM number is 0452954, 0451686. 2,Applicable Model: Chain tensioner, replacement for Polaris Rzr 170 2009‑2013, replacement for Polaris Predator 90 2004‑2006, replacement for Polaris Sportsman 90 2004‑2014 etc. 3,OE Standard Accuracy: Chain roller tensioner made of steel alloy. Through a die‑casting process to achieve maximum structural integrity, and processed by advanced CNC cutting technology to achieve OE standard accuracy. 4,Automatic Adjustment: Heavy duty chain idler guide wheel with upgraded torsion spring. Spring loaded tensioner automatically adjusts tension towards chain elongation. 5,High Performance: Chain tensioner has smooth rotoring and longer life. Easy to install, protects swing arm and helps guide chain correctly. Specifications: Item Type: Chain Tensioner Material: Steel Alloy Replace OEM: 0452954 0451686 Tensioner Function: Automatically adjust the tension towards the chain extension Fitment: Replacement for Polaris Rzr 170 2009-2013 Replacement for Polaris Predator 90 2004-2006 Replacement for Polaris Sportsman 90 2004-2014 Replacement for Polaris Sportsman 110 2016-2018 Replacement for Polaris Outlaw 90 2007-2014 Replacement for Polaris Outlaw 110 2016-2018 Package List 1 x Chain Tensioner 1 x Spring Hook Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.