engine air filter

This came with my Ford Performance Kit but I already had one. Brand new unit, still in the plastic in the box. $43 shipped or less if you pick it up. - Rainier

Hello all, Here is an interesting debate I see online about replacing the engine air filter and cabin air filter. I live in Northern California, and recently, the wildfire smoke has been really bad here. My own HVAC filter is black from filtering out the outside smoke. Now for the car engine...