Mack CH/CL/CX 20QE3191 Leveling Valve Delay Type PAI 36280CROSS REFERENCE: 20QE3191 25069734 APPLICATION: Mack CH CL CX Multiple Use Application. DETAILS: All Ports 1 8in P. T. BRAND: PAI 36280 Mack 20QE3191 Leveling Valve PAI 36280 designed for heavy truck parts and truck engine parts. Provides precise suspension regulation and consistent ride stability. All components are proudly manufactured in the U. S. A. by PAI Industries Inc., an ISO9001 certified company with over 50 years of experience in the heavy