Ford's 7.3L Powerstroke from 1994 to 2002, named the Navistar T444E, has tremendous performance potential. Quality air intakes and filters are one of the best modifications you can do to your truck. Especially if it's the first mod you're going to install. Here at Heavyweight Diesel, we're very aware of that, and for that reason, we choose to sell exclusively the best air filters and intakes on the market.
The 7.3L Ford Powerstroke's airbox is restrictive, reducing your truck's horsepower, torque, and fuel economy. You would be surprised by how much an air intake or replacement filter from Banks Power, aFe Power or S&B can do for your truck. Especially if they're combined with a quality tuner! Another modification that works very well with aftermarket intakes and filters are exhaust systems.
Keep in mind that your driving conditions can affect which air intake and filter you should purchase. If you're constantly driving on dusty roads or off-roading, a dry filter will do wonders for your truck. On the other hand, an oiled filter works excellent if you mostly drive on pavement.