Is your vehicles air suspension rising slowly, noisily, or perhaps failing to rise at all? EAS Amber light lit? Fault code C1A20, C1A1364, C50, or C1A20-64 showing? One or more of these errors: “Suspension error only normal height available” “Suspension fault; pressure not rising quick enough” Or “Pressure does not decrease when venting gallery”? THE SOLUTION: Fit our improved design piston ring, glide ring and filter kit and restore your compressor to full health. Our complete kit includes all needed to restore your compressor to full health. Our kit includes a new improved design glide ring and piston ring, constructed to the finest of tolerances from improved materials to restore full output. Also included is two custom tools to allow easy replacement of these seals. Full filter replacement kit to allow you to replace all filters and drying beads within the drier unit, the original filters saturate quickly and drastically effect output, our improved replacements will solve this problem. X2 air collet Viton o-rings, X2 piston liner Viton seals, X1 high temp Piston liner gasket no need to reuse the poor quality originals! X1 dryer to compressor Viton O-ring seal, X1 metal filter Viton seal, X1 dryer end cap Viton seal. Replace all dryer seals with our improved material Viton seals to cure present and prevent future leaks. PLEASE NOTE THIS IS REPAIR KIT FOR HITACHI BRAND AIR COMPRESSOR AND DRIER, NOT ACTUAL DRIER ASSY › See more product details