Precision Oil Pumps OLDSMOBILE 350- 455 Billet Oil Pump Drive. It is CNC machined from 3/8' diameter Billet 4140 Chrome-Moly. We used the largest diameter material able to pass through the main cap. They are Heat-treated with Rockwell Hardness. Has black-oxide ends and polished center. All drives feature our special Hex-Allign tip, this allows for easier distributor installations. These are the strongest on the market

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