Lol, I guess I was a little vague. Rob suggested that I take an incensce stick, light it, start the car (cold so the radiator fan is off) and take the stick (which put off a decent amount of white smoke) and move it around the intake manifolds and y pipes and such and observe if it's sucking the air in anywhere.

Sure enough the rear of my passenger side intake manifold was sucking the air in, and upon further inspection, I saw a crack in the gasket