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. Specification: Item Type: Chain Tensioner_x000D_ Material: Steel Alloy_x000D_ Replace OEM: 0452954 0451686_x000D_ Tensioner Function: Automatically adjust the tension towards the chain extension_x000D_ _x000D_ Fitment:_x000D_ _x000D_ Replacement for Polaris Rzr 170 2009-2013_x000D_ Replacement for Polaris Predator 90 2004-2006_x000D_ Replacement for Polaris Sportsman 90 2004-2014_x000D_ Replacement for Polaris Sportsman 110 2016-2018_x000D_ Replacement for Polaris Outlaw 90 2007-2014_x000D_ Replacement for Polaris Outlaw 110 2016-2018 PackageList: 1 x Chain Tensioner 1 x Spring Hook Note: 1. Please double check the part number of your item, matching information is for reference only._x000D_ 2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!