Polaris 2521718 - Replacement MPN: 2521718 OEM Polaris Product, Part Number: 2521718 Fuel Injector, Part 2521718, and all other Polaris Engineered service parts, deliver unmatched performance and fit for your vehicle. Each one is extensively tested in the field and meticulously crafted to match your machine. All service parts are engineered specifically for your machine. Which means everything is designed, tested and perfected to maximize the life of your ride. Getting Polaris Engineered parts is a decision that pays off in the long run, because it ensures there is a long run. OEM Polaris Fuel Injector Part # 2521718.