Sierra 18-5431 Mercruiser V8 Rotor Assembly Sierra high-quality engine parts are designed to meet OEM specifications. Fits GM V-8 Engines with Thunderbolt IV V Ignition. Interchangeable with GLM 71080 Mallory 9-29200 Mercruiser Stern Drive 13524A5 13524T1 13524A1 19405A3 90576A2 California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type Engine Parts Product MPN 18-5431 Product UPC 030999319302 Fast Ship In Stock Ships Today