Free horsepower. What a great idea. In the case of resonant manifold tuning, most commonly known as ram tuning, an engine can actually realize additional horsepower and torque simply by catching the ...
Owner Brian Ferguson says, "I use my 1997 5.9L Dodge Ram truck as an off-road toy and to tow a trailer with my dirt bikes. I wanted more low-end power—and reliability." When the 5.9L (360ci) Magnum ...
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