KYB 341619 Excel-G Gas Shock KYB recommended OEM replacement shock for Heavy Duty Trucks and Commercial Vehicles Specifically calibrated to help restore the original capabilities of Heavy Duty Chevrolet trucks Uses a seamless working cylinder matched with a Teflon coated piston band for a positive seal and longer life Triple chrome plated piston rod and multi-lip oil seals that reduce wear Solid seamless mounting eye rings and bolt bushings to eliminate rattles