Correct. This was the only mod done between dyno runs.
Also correct, and forms the very reason.
So heres my point; Dynos are a tuning tool. Anyone chasing a dyno figure is missing the point IMO. As my example has pointed out, you could achieve 150rwkw at one place then have another place "retune" the car and achieve 195 without effectively doing anything. I'm not sure anyone with half a twit is going to argue you can get 42rwkw by adding a high flow cat.
A dyno figure is not going to give you any idea how fast the car is going to be, and because of this, dont mean squat.