I'd guess around 20hp. FP and 5star s550 tunes are 19hp @6500, 42lb/ft at 2000, and 18lb/ft at 4500. Plus better throttle response and more aggressive shift points. It will put regular GT over 100hp per litre, over 500 total, and more than dark horse
I'll tell what's excellent. My 2022 F-150 has these two rounds things you can turn to whatever fan speed and temperature you want. Extremely easy to put your hand on out of the corner of your eye while driving. They are very similar to the round thing the s650 has for volume adjustment.
I was worried about my speedo being off with 285/35r20 but it's exactly dead on. I never checked stock tires with GPS but I will this winter when I put them back on. Assuming it was just off from the factory and I got lucky, I've also seen people post here that the speedo auto corrects for tire...