Plastic intake runners were not going to live through the punishment Rob subjects the stock engine to. A custom-built plenum was fabbed to hold the pressure of the twin turbochargers. Both the pressure pipe (pressurized from the turbo) and downtube (exhaust after the turbo) run down to the bottom of the engine compartment, after which they go in opposite directions. The downpipe goes back to the mufflers, and the pressure pipe goes to Rob's custom bottom tank on the intercooler. On top of the air-to-air intercooler is another hand-fabbed piece by Rob. The top tank is a huge air funnel that increases the velocity of the cool air charge and allows the pressurized molecules to be rammed into the cylinders.