Part Name：Common Rail Fuel Injectors Part Number：173-4647 1734647Application：Fits for Caterpillar CAT 539 Knuckleboom Loader 3114 3116 EngineProduct Status: New 180-day warrantyPlease be sure to confirm whether your engine's specific model or the required part number matches this product. If you have any questions about compatibility, you can contact customer service at any time to provide parameters to avoid situations where installation is not possible due to model mismatch.