any tricks to keeping the stock pipes from blowing off under high boost?
My gut says that any expansion (and how much will those burly rubber pipes honestly stretch over a mere 2 bar of pressure??) would be negated by increased heat transmission from the turbos all the way through the now-metallicized intake tract. Them turbos are hot, and the more they're isolated, the better!
I think its to do with the pipes flexing and squashing upsetting the flow of air to the engine etc under extreme boost settings and then changing gear so swinging from say 2bar back to -1bar. Also the rubber could eventually fatigue and split under this type of pressure cycle.
Those who've had a intercooler pipe blow off, especially the lower ones behind the bumper, will know its probably better to have a set of hard pipes, knowing that theirs less likelyhood of it blowing off.