I have tried searching for this, but does anyone happen to know what the air flow direction is for an 06 Corolla cabin air flow? I just replaced the factory cabin air filter... the factory filter has an arrow pointing up, but does that indicate the air flow or just telling people to keep the top part of the filter up? The new filter I bought from Wal Mart simply indicates air flow direction and I don't know if that is the same as what the factory air filter meant. Does anyone know the answer to this? Thank you.