If your REALLY want to increase the fuel pressure anyway, I'd suggest the 255lph "high pressure" version. It will withstand the higher pressure better than the regular 255lph pump. The biggest strain will be on the wiring (see graph). The stock wiring sucks. It would be a really good idea to run a low gauge wire idrectly from your battery to the pump, then relay it with the stock wiring. I did this to my car and a lot of the high HP guys (not me - LOL) do it too.
Regular 255 pump
High Pressure 255 pump
