Feature: 1. Applicable Model: The marine propeller shaft hub kit is replacement for MerCruiser XZ XR Racing Sport Master, replacement for Verado SCI 350 400 450 HP 1.25in Shaft. 2. OE Number: The part numbers for reference are 840389K06, 840389K5, 840389A5, 840389A2, 840389A1, 8M0183487. Please confirm whether it is consistent with the OE you need to avoid wrong buying and other problems. 3. Enhanced Performance: Designed to improve your boat's performance by providing seamless propeller shaft hub operation, and protecting your boat from most impacts. 4. Quiet Operation: The marine racing prop shaft hub kit helps prevent shifting noise and propeller rattle to deliver quieter, smooth, delivery of your engine's power to the propeller. 5. Sturdy Construction: Made from high strength materials, the heavy duty propeller shaft hub kit is durable and reliable, high strength and wear resistant, ensuring long lasting use, also having simple installation. Specification: Item Type: Marine Prop Shaft Hub Kit OE: 840389K06, 840389K5, 840389A5, 840389A2, 840389A1, 8M0183487 Fitment: Replacement for MerCruiser XZ & XR Racing Sport and Master, Replacement for Verado SCI 350, 400, 450 HP (1.25in Shaft) Fit for All Engines and Drives with 1.25 Propshafts. Package List: 1 x Marine Propeller Shaft Hub Kit (5Pcs) Note: Please double check the part number of your item, matching information is for reference only.