Ford Aluminum 5.4L Header Swap - All-American Header Test Part 2
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The final test run with the stock supercharger was with a set of custom 2.0-inch headers. The largest-diameter primary tubes produced the highest peak power numbers of 663 hp and 583 lb-ft of torque. The peak boost numbers registered with all of the headers was consistent at 7.2 psi. View Related Article
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