I spoke to a guy today whose has crazy knowledge about cars and such, especially turbo one's. I talked to him today about fabricating hardpipes for our intercoolers and although mentioning it's advantages pointed out to me that the reason the egineers chose felxible plastic is because of how the pipes are mounted perpendicular to that of the engine motion under rev/acceleration that those pipes have to flex in-order to move with the engine. He said that the biggest problem is going to be that when you mate the metal hard pipes to that of the intercooler, throttle body, and turbo, that when the motor moves under stress the first thing your going to do is crack the plastic mounts on the intercooler because the metal hardpipes are obvioulsy not going to flex and the first thing to give way will be the plastic. Now he mentioned using rubber pipe connectors like that in an intake, and that those may flex enough when the engine moves, but there's no gurantee. I don't know, i'd be interested to see what your cooking up, and what design your planning on useing, but am worried about some of the side of effects of such an application.