Depends, what are you trying to do? Bring air in, or take air out? The intrepid has a tight engine bay, with little room for air to exit around the engine. Air comes in the grille, through the radiator, then into the engine bay and stacks up there, escaping around the bottom of the engine. Not exactly optimal. If you build a hood designed to pull more air into the engine bay, and you don't either give the extra air someplace to go or confine it to your intake, there will be little to no gain. If your intention is to increase cooling to the engine, install a set of rear facing louvers or hood vents to allow the hot engine air to escape. This can dramatically reduce underhood temperatures. This creates an airflow where the air comes in the grille, through the hot radiator, and the now hot air is immediately dumped out allowing more air in to replace it. I did it on my Jeep and noticed huge reductions in underhood temps.
whodat