I dun press-ed muh PWR button! Which is short for... Ectoplasmic Power!
So, what it does is lets the revs go higher before shifting. On a torquey short-shifting 5 speed (seriously, it will shift before 2500 rpm), this is actually quite useful. And makes it a little more fun.
Doggo for the 30 seconds of your life you won’t get back: