<strong>1</strong>. Our test subjects came from a local wrecking yard. Other than long-tube headers feeding Borla XR1 race mufflers, an electric water pump and Accufab throttle body, the test engines were stock, high-mileage units. Tested in this trim, the 4.8L managed 333 hp at 5,400 rpm and 343 lb-ft of torque at 4,700 rpm.
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