Nothing wrong with a stock replacement filter. If you are willing to get involved in periodically cleaning the filter the after market drop in filters from K&N, Green, Airaid, etc will cost more but it will last the life of the car.What do you guys recommend to replace engine air filter on an ecoboost? stock or aftermarket? I'm getting my oil changed soon, and am going to see if my air filter needs changing.
I haven't seen any specific data on them, but they are a typical cotton gauze type filter IIRR...... so, I really would not recommend..what about a dry flow filter like from AEM?