Doing a 12 valve cummins 4k governor springs install
If you're ready to actually use the power your truck is capable of, a 12 valve cummins 4k governor springs install is pretty much the first "real" mod you need to tackle. Let's be honest, the stock P7100 fuel pump is a masterpiece, but it's also a bit of a buzzkill from the factory. It starts pulling fuel back right when things get interesting, usually around 2,100 or 2,300 RPM. You're merging onto the highway or trying to pull a grade, and just as the turbo is singing, the pump decides the party is over. ...