Aftermarket Mercruiser 13524A6 Thunderbolt V6 Rotor Assembly
The Sierra 18-5431 Rotor Assembly services the applicable marine ignition system in Mercruiser applications. It replaces Mercruiser 13524T1.
Fits: GM V8 Engines With Thunderbolt IV & V Ignition

Need help with fitment? Contact us with your engine model and serial number and we'll help check suitability.
What is Sierra 18-5431?
Sierra 18-5431 is an aftermarket rotor assembly for Mercruiser applications.
Which part numbers cross-reference Sierra 18-5431?
This listing cross-references Mercruiser 13524T1, GLM 71080, Mallory 9-29200 and Mercruiser 13524A1. See the Cross References & Alternative Products section above for linked alternatives where available.
How can I check whether Sierra 18-5431 fits my Mercruiser application?
Contact us with your engine model and serial number and we'll help check suitability.