free power
What is this a joke or being serious. I don't know enough about our trucks to tell the diffrence.
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3k and 4k kits refers to 3000 rpm or 4000 rpm governor spring kits. Basically a set of springs that replaces the stock set to increase the rpm point where the governor pulls the fuel back. The 3k rpm kit can be run with stock valve springs, but he 4k rpm kit is meant to be run with heavier valve springs. The other free mods make them pretty peppy, but the gov. spring kits really wakes them up.
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