FREE HORSEPOWER HAS A NICE RING TO IT, doesn't it? In this day and age, it's almost a foreign concept to think that you can add power to any vehicle without first opening up your wallet. However, there was a time when turning wrenches led to solid performance gains. For the ultimate example of low-buck power-adding, look no further than the '94-'98 3/4- and 1-ton Dodge Rams equipped with the 5.9L Cummins. Thanks to being graced with the Bosch P7100 injection pump (aka the P-pump), 100 hp or more can be unleashed once a few key areas of the mechanical pump are modified. All that's required is a little bit of your time and a few simple handtools.
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