406 Small Block Chevy Beehive Valve Springs Upgrade Old And New Valve Springs
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The difference between old and new is striking, but they do have their similarities. Both springs specify an installed height of 1.800 inches; at this height, the old spring measured 135 pounds, while the new was 130 pounds. Open load, measured at 1.200 inches, was even closer: 320 pounds for the old, 318 for the new. Our beehive springs will run at a nominally lower rate since we used a slightly higher installed height. View Related Article
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