When Whipple finalized my install in March. They told me the only new part was this wiring harness and this was the final configuration they were shipping. They did not note changing the sensor. The referenced post is mine and I do not recall mentioning a new MAP sensor. I'm curious what you get.
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With regard to the comments on the cats with Whipple, they mentioned that changing the exhaust did nothing for the kit without tuning. This was at the time when no one had access to tune the '23 and later trucks other than Whipple and Ford was involved in every step. This is discussed earlier in this thread and the conversations were over a year ago. They noted that there was no reason to do a cat back exhaust other than to make more noise. The manifolds and cats were the limiting factor. We did not go into the exact details as CARB compliance is a must for me here is the Peoples Republic of CA and a manifold and cat swap for long tube headers and high flow cats is a no no. I didn't ask. Is it flow? Cooling? I don't know but now you have me curious.
The 5 Star comment I shared is a direct cut and paste of what they wrote and matches what Whipple told me. The cats need to go to get more power out of the kit. I do not know the exact reason. I will question 5 Star on one point. They claim that the Whipple tune is speed limited. I had the opportunity and the space to run the tune Whipple gave me last week all out yesterday. The speedo showed 100 and it kept accelerating for a few hundred RPM after that before I let off. If it is limited it is definitely at a point higher than stock. (Separately, Whipple has not fixed the tendency for cruse control to not downshift on long steep grades causing the engine to lug and the truck to slow down unless you give a quick push on the accelerator.)
Going back to the Whipple conversations, I got that Whipple's goal with this kit was for a stock Super Duty to be 50 state legal and to improve what a Super Duty does, tow haul and work. Having run it longer than anyone else on a '23 and later truck now I think they nailed it. Now that 5 Star (and others) have access to tune them I look forward to hearing about how parts are changed and they're tuned to be even be even better. Unfortunately I'll need to wait for the Trump administration to win its battle with California before participating in such shenanigans.