OK, please STOP posting this man. Stage 2 includes just a Test Pipe man. You also don't need a FP to run ANY of the base maps and a FP will NOT fix any KR as that is a TUNE issue and not a FP issue.
You only need a FP if you have the mods that free up your system and you plan to get a CUSTOM tune as it will demand more fuel than the base maps be they Stage 1 or Stage 2.
With my mods listed, my stock FP JUST STARTED to have FP issue as I was getting a custom tune from Cobb. When I mean just started I mean on full WOT runs the ONLY time my FP Dipped was imediatly after a shift and then it ONLY dipped to 1358PSI (in ONE log) and then right back to 1600-1700 with the STOCK FP.
However, I was getting a custom tune so I was worried that it would dip more as the tune was finalized, so I got internals.
Your TUNER was talking Intake, TBE you will probably need Internals as any Custom Tune will demand more fuel as it will push the limits. However, the Stage 1/2 tunes for the AP (103 maps) do NOT require a FP upgrade as they simply do not run hot enough for one.
So friend, you simply can't say "EVERYONE" needs internals or a FP upgrade if they buy an AP as that is simply false information. So please stop saying it. Unless you're getting a custom tune that money is better spent on something like a DashHawk so you can monitor your entire system and tell when you REALLY need something.