Originally Posted by garcmol
I don't know crap about turbos or superchargers. With that said, what is the purpose of the GMPP airbox under the hood? It doesn't look like it's even hooked up. Does turbo use air from outside or what? Hate to ask dumb questions, but I don't understand.
You still have air intake just on the opposite side of the turbo. The airbox is still used but the intake pipe is under it and back to the turbo then that goes to the engine intake.