What kind of filter would you guys recommend. I want to an intake with a cold air box. I want to make it so that I can extend the cone into the fenderwell, leave it in the box, and be able to remove the box. the purpose of this is so I can choose between fender or normal intake. and remove the box so I can have slightly warmer air so I dont kill mileage. I want to compare the three methods. but I need to know what filter will fit in the fwi. should I use the cheap Spectre intake filter from autozone?