KYB 334604 Excel-G Gas Strut twin-tubeTechnology, designed for European performance vehicles Specifically calibrated to help restore the original handling and control characteristics of your BMW Z3 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 Features a precision, sintered iron strut rod guide to help retain correct wheel alignment