Peterbilt 359 Air Springs & Level Valves - Essential Components for Heavy-Duty Suspension Performance This essential product line covers a wide range of air spring and leveling valve components designed specifically for Peterbilt 359 semi-trucks. Whether you need replacement air bags, pedestal assemblies, or leveling valves, you'll find high-quality parts from trusted brands like BESTfit, Hendrickson, and Neway. These components play a critical role in maintaining the optimal ride height, stability, and comfort of your Peterbilt 359's air suspension system. Upgrade your truck's handling and performance with the best air spring and leveling valve parts on the market.