Ford Aluminum 5.4L Header Swap - All-American Header Test Part 2
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Before getting to the big boost numbers, we first tested the Kenne Bell blower with the stock exhaust manifolds to run one header-to-manifold comparison. Equipped with a 3.25 pulley and a peak boost reading of 14.1 psi, the 5.4L produced 753 hp and 619 lb-ft of torque. View Related Article
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