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The most trick piece on the entire engine is Ford's new "Z" aluminum racing head. Besides being cast from A356 T6 aluminum, the heads feature stud-mounted rockers, manganese bronze valveguides, and Ford's M-6513-A351 valvesprings with steel retainers. The intake ports are 204 cc as cast-a bit small by conventional racing standards, but probably just right given the lower rpm this engine will be running. View Related Article
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