Frequently Asked Questions About International ProStar Air Springs & Level Valves

What years of International ProStar are these air springs compatible with?

Our air springs and level valves are designed to fit International ProStar models from 2008 through 2017. The mounting patterns changed slightly between the 2007 and 2008 model years, so earlier models require different components. Always verify your specific VIN and suspension configuration before ordering, as some ProStar models came with different suspension options that may affect compatibility.

How difficult is it to replace air springs on a ProStar, and what tools do I need?

Replacing air springs typically takes 2-3 hours per side for someone with moderate mechanical experience. You'll need basic hand tools, jack stands rated for commercial vehicles, and ideally an impact wrench. The most challenging part is usually breaking loose the old mounting bolts, which can be corroded. We recommend having penetrating oil on hand and supporting the axle properly during installation. Many customers report the job is manageable in a home garage with proper safety equipment.

What's the difference between OEM and aftermarket air springs for the ProStar?

Aftermarket air springs we carry use the same rubber compounds and steel components as OEM parts but often cost 40-60% less. The main differences are in the crimping patterns and sometimes the air fitting locations, though performance remains identical. Many aftermarket options actually exceed OEM specifications for burst pressure and cycle life. Look for brands like Firestone, Continental, or Hendrickson for proven reliability.

How do I know if my level valve needs replacement versus just adjustment?

If your ProStar leans to one side, sits too high or low, or takes excessive time to level after loading, start with a simple adjustment before replacing the valve. However, if you notice air constantly bleeding from the exhaust port, the valve arm is bent or broken, or adjustments don't hold their settings, replacement is necessary. A properly functioning level valve should maintain ride height within 1/4 inch and respond to load changes within 10-15 seconds.

Can I upgrade to heavy-duty air springs if I frequently haul maximum loads?

Yes, several manufacturers offer heavy-duty air springs for ProStar models that handle frequent maximum weight hauling. These upgraded springs feature thicker rubber walls, reinforced bead plates, and higher pressure ratings (typically 120-130 PSI versus standard 100 PSI). They use the same mounting points as standard springs, so no modifications are needed. This upgrade is especially recommended for vocational applications or drivers who consistently run at 80,000 pounds gross weight.