Feature 1Wide Application: SSR HD hub kit is for use on 200 to 400 hp 4 Stroke outboards with 1.25in propeller shafts, suitable for MerCruiser Bravo One XR KZ. 2OE Replacement Number: The part number for reference are 8M0101601, 8M0101603, please confirm whether it is consistent with the OE you need. 3Improve Shift Noise: SSR HD hub kit helps prevent gear shift noise and propeller rattle, resulting in a quieter and smoother transfer of engine power to the propeller. 4Reduce Vibration: The SSR HD propeller hub system designed to reduce vibration on high horsepower outboards, reduces vibration by 25% during gearshifts 5Durable Construction: Made with copper and rubber materials, the kit assembly is built to last. It is resistant to wear and tear, ensuring long lasting performance even in harsh marine conditions.Item Type: Hub Kit AssemblyMaterial: Copper + rubberOE: 8M0101601, 8M0101603Application: Heavy Duty 1 1/4in propshaft when installed on Racing 200XS, 225X, 2.5 EFI, 225 (Pro X, Pro XS, Sport XS), 250 (XS, Pro XS, Sport XS), 300 (X, XS), Sport Torq Master Gearcases (not Fleet Master) and for MerCruiser Bravo One XR KZMaximum Horsepower: 450HP .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x HD Hub Kit Assembly (5pcs)NotePlease double check the part number of your item, matching information is for reference only.