Premium Replacement Rotor for Mercruiser Inboard Engines with TEI IgnitionThis rotor fits GM (V8) 5.0, 5.7, and 7.4L engines with Mercruiser Thunderbolt Electronic Ignition.Replaces:MERCRUISER Rotor 13524A1MERCRUISER Rotor 13524A3MERCRUISER Rotor 13524A5MERCRUISER Rotor 13524T1MERCRUISER Rotor 19405A3MERCRUISER Rotor 90576A2SIERRA Rotor 18-5431CDI ELECTRONICS Rotor E65-0009*ARCO Assurance 12-month part and labor warranty protectionThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.