You really don't need to buy a full kit. Save hundreds by going to autozone and buying some individual parts for it. I spent $25 on mine, and it sounds deeper, has better throttle response, and more power. I kept the factory air tube and MAF assembly. Bought the adapter, attached it to the MAF, then attached the air filter to it. The adapter is a 3" I think. And take out the stock air box, and the bracket it fits into behind the headlight. This allows more air to pass freely from the front on the truck to the filter.
2000 2.5L Ford Banger
What I've Done: Pioneer Head Unit, Nexen 31" Tires, Projector Headlights, Manual To Power Locks, Jet Black Paint Job, American Racing Baja Rims, Billet Grille, Herculiner, Rail Caps, Tinted Windows, Explorer Radio Bezel, Wired Bezel For Projectors, Kicker Sub/ Visonik Amp, Black Carpeting, Kicker 6x9 Speakers, High-Flow Air Intake, New Horn, Black Interior. Center Console, many more still in process.