High quality replacement part, Front Lower Left & Right Inner A-arm Bushing Kit fits Polaris models: Sportsman 450 HO 2×4 2016-2019 Sportsman 570 EPS 2016-2020 Sportsman 570 Touring 2016-2017 Sportsman SP 570 EPS 2016 Sportsman 570 6×6 Big Boss 2017 Sportsman X2 570 EPS 2017 ACE 570 EPS 2016-2019 Kit includes: 2 x Long Pivot Shaft: 5139929 Length: 282.6 mm Inner Diameter: 8.2 mm Outer Diameter: 16 mm 4 x Flange Washer: 7556153 Thickness: 2 mm Inner Diameter: 10.6 mm Outer Diameter: 19.8 mm 4 x Bushings: 1543326 Length: 29.7mm Inside Diameter: 16mm Head Diameter: 31.5mm Tube Diameter: 21mm Front Lower Arm Part Number A Left: 1542161-458 1542161-067 Right: 1542162-458 1542162-067