This shock absorber kit fits Mack and Navistar suspension applications and is sold as one each. It includes four shock absorber insulators along with a separate shock absorber kit component, built as a replacement for the original equipment. Mounted between the axle and frame, the assembly helps control spring oscillation for smoother ride quality and better tire contact with the road.Interchanges:14QK2107P214QK2107P3210919R9125625091453574C91Mack 14QK2107P1Navistar 210918R91HSA-5095FeaturesShock Absorber KitIncludes 4x FMM-4675 shock absorber insulators (OEM 14QK136)Includes HSA-5095-001 shock absorber kit component (OEM CK)Sell pack: 1 eachTech SpecsSell pack: 1 EACHKit contents: 4x shock absorber insulator (FMM-4675 / OEM 14QK136), 1x shock absorber kit component (HSA-5095-001 / OEM CK)