At our last dyno tuning session, I maxed out the Walbro 255lph fuel pump around 25psi. The car had more to give, but the pump was the limitation. Enter the Walbro 400lph pump! This pump should give me the fuel pressure I need at higher boost levels without requiring a secondary, in-line fuel pump. The installation seems pretty straight forward, especially since I already have a Walbro pump installed. I’m hoping that the wires and plugs match up, meaning that this can be a 10 minute swap. Here is a good writeup on installing the Walbro in an S14. This is a nice video for installing the pump in a 240sx as well (it’s part 1 of 2).