i had a k&n intake on my truck, but i was needing some money so i sold it to a friend. i didnt feel like putting the stock air box in so i put a cone filter on the end of the tubing(where the box would be).Is it okay for me to do this, or should i put the stock box and filter on? they way i have it now kind of reminds me of having an intake, just with more bends in the stock tubing.