Air Spring Spacers are necessary when installing air bags into your lifted 1994-1997 Ford 7.3L Powerstroke. Ranging from 2" to 6" in height, these products are available in many different sizes. They are sold in pairs and are manufactured from durable polyurethane or heavy-duty steel. Pacbrake, Daystar, Hellwig, Firestone, and Airlift are just some of the brands you'll find.