Smeding Performance 572 Crate Motor Head Bolts
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What makes the 572 really thump is a set of Airflow Research 325cc aluminum cylinder heads (PN 2101). They boast 2.300/1.880-inch valves, 115cc combustion chambers, and killer as-cast intake ports that flow an incredible 384 cfm. Smeding runs them straight out of the box, and the results speak for themselves. They were torqued down to 75 lb-ft with ARP head bolts. View Related Article
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