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I found this.... http://www.dpausa.com/pdf/cummins_prices.pdf I assume these are the buttons? Edit: yes, they are. I used the #20 button and omitted the leading designation and found it online. From that other link. 141629 http://www.dieselpartsdirect.com/Products/194217-ds141629.aspx

Anyone have the part numbers?

I removed the check ball and turned it 1/8 of a turn even before I did the line mod. Didn't touch it after the line mod though.

Nope and nope.

The injectors in these trucks are driven from the cam. So increasing the pressure just forces more volume into the injector during the injection event. I have a dual line setup on my truck. I haven't changed the button, but I felt more power out of it. Not a lot mind you. But it does seem...

Anyone have any part numbers for the buttons? Or a place to get them?