Seller notes

1999-2013 GM Truck/SUV Silverado Sierra 3.5" Overdrive Billet Aluminum Alternator PulleyFactory OEM alternators are only designed to spin up to 18K RPM so if you have a high revving LS engine and you are replacing alternators every other pass, chances are you need a larger alternator pulley. (SEE ATTACHED CHART)Manufactured right here in the USA this 6061 billet aluminum 3.5" overdrive alternator pulley was made to replace the GM steel pulley. 3.5 inch outside diameter, 0.670" bore diameter and ...

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