Partsam Rear Set Shocks Struts For Toyota Sienna FWD 7 Passenger A seamless working cylinder vs. welded seams provides the best sealing surface throughout the entire piston stroke Precision multi-stage hydraulic valves that reduces fluid travel to minimize aeration and are calibrated the way OE intended the vehicle to perform Triple chrome-plated piston rod and multi-lip oil seals that reduce wear Solid, seamless mounting eye rings and bolt bushings that can't separate and become noisy Chemically bonded insulator mounting bushings that won't slip out