Is it really worth 10-15 HP when you're talking 575-650 HP???
When is that 15 HP ever going to make a difference?
I'm not hating, just trying to figure out why someone would do it?
Particularly since at least a couple have had blown motors.
Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."