Sierra Distributor Rotor Assemblies are manufactured to stringent quality standards and are fully interchangeable with the OEM parts they are designed to replace. The engine ignition parts we offer by Sierra meet or exceed OEM specifications for quality and performance. Our selection includes tune-up kits, rotors and ignition components for most outboards, I/O and inboard engines on the water today. Key Features Sierra parts meet or exceed OEM specifications for quality and performance Backed by SeaStar Solutions Two-Year Limited Warranty How to order the Rotor Assembly you need Click the dropdown menu above and select the Sierra part number you want If you do not know the Sierra part number, proceed to our Engine Parts Selector, where you can search by OEM part number, engine manufacturer, model number, year, horsepower, and serial number.