Polaris 1019356-458 - Replacement MPN: 1019356-458 OEM Polaris Product, Part Number: 1019356-458 Trailing Arm, Left Hand, Matte Black, Part 1019356-458, and all other Polaris Engineered service parts, deliver unmatched performance and fit for your vehicle. Trailing Arm, Left Hand, Matte Black, Part 1019356-458 is a structural suspension member that helps support the vehicle. It is designed and tested by Polaris Engineers to ensure durability, high quality, and performance through rigorous field and lab validation testing. Spend less time doing tedious maintenance and more time out on the trails having fun. We've been a leader in the powersport industry for nearly 70 years, don't settle for.