So I have to resurrect this thread. I recently installed the 2015 performance pack (brembo style) 4 piston front calipers. I am having the same issue. First, lots of travel and no engagement until the second pump. Messed with it, bled the lines multiple times, etc. Then I fixed an issue with a twisted line. Next day I went out and bled them once. Finally normal engagement, but on road test it just didn’t feel like it was stopping home it should. So I bled one more time thinking that would be good, annnddd no brake pressure. When you say the pedal goes to the floor do you mean literally the floor? Mine now goes way down and while the pedal is not resting on the floor, when i push in all the way I can feel it hitting something which I am assuming is “the floor”. Bled 3 more times and same thing. I have no idea why it would get pressure and then I bleed again and it’s gone???