Unless you are updating the transfer pump, I wouldn't change anything, when you enlarge the lines on the stock fuel system you will loose your pressure, the stock pump is made to work with those lines. For your HP level you don't need to change anything from what is already there, you may actually hurt performance.
3406b pump mod help!!
Discussion in 'Trucks [ Eighteen Wheelers ]' started by flc120, Aug 14, 2012.
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