AEM is proud to introduce its BRUTE FORCE intake system for the 2005-08 Ford F150 5.4L V8 (part # 21-8117D). The largest power gains for the 21-8117D are 19 horsepower and 22 lbs/ft of torque at 4500 RPM as measured on the company'iacute;s Mustang Dynamometer. AEM BRUTE FORCE intakes are dyno-tested against the competition to deliver unsurpassed performance. We tune each system on the vehicle on the dyno to deliver maximum torque and horsepower.