495 HP at 7,400 Small-Block Ford Build
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For this test, we left the lash stock at 0.016 and 0.018 inch for the intake and exhaust. But we considered loosening the exhaust duration to help the peak horsepower based on how well these heads flow. Loosening the lash reduces exhaust duration, while tightening the lash increases camshaft duration. View Related Article
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