Really good engine's!
I had the AUQ lump in my old Octavia vRS. Had it running a stage 1 with a few other mods, 210 ~ 225bhp.
Got 30k of mostly daily abuse and still ran sweet as a nut. Only thing with the k03s is that it runs out of poof quickly.
I'm very surprised the k03s could flow enough to make 252bhp.
As GVK said, they all suffer from the vac / breather hose failure so worth checking out!