11 Two Valves Per Cylinder Terror
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9 Before running the blower, we did a quick intake test by first running the naturally aspirated engine with a stock PI intake and Accufab throttle body. Equipped with the PI induction system, the low- compression 4.6L produced 348 hp at 5,900 rpm and 349 lb-ft of torque at 4,700 rpm. All testing was run with a set of 1-3/4-inch long-tube headers from Kooks feeding a pair of Borla XR1 racing mufflers. View Related Article
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