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0412pon Iron 13 Z

Ferrea stainless one-piece valves are 5.200 inches long to fit the R/A IV heads with the familiar 2.11/1.77 head diameters. But they also feature undercut stems to improve flow and swirl polishing.
Pontiac Race Engine - Vintage Brawn

Ferrea stainless one-piece valves are 5.200 inches long to fit the R/A IV heads with the familiar 2.11/1.77 head diameters. But they also feature undercut stems to improve flow and swirl polishing.  View Related Article

 

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