2x Front Air Shock Suspension Struts for Mercedes-Benz S550 W221 4-Matic 07-13

OE-style louvered tubes (where applicable) help reduce radiated noise for factory-style sound quality Engineered to fit, perform and sound like the original system Durable aluminized steel construction and helps reduce corrosion Features thick OE-style flanges, hardware and brackets for strength. Air Tightness Test Our Air Suspensions past 24 hours air tightness test ≤2.0Mpa. Ensure no air leakage Stress Test Our Air Suspensions past stress test over 5000000 times. Ensure high load-bearing capacity and long life Burst pressure tests Our Air Suspensions pasts burst pressure tests ≥2.0Mpa, high compressive strength and less noise. Works well in complicated climate Our Air Suspensions work well in temperature ≤+70° , ≥-40°, easily handle complicated climate High Quality - Manufactured to OE standards for performance and durability - Dimensional and material checks, fatigue analysis more than 5 millon times - High Quality rubber with Alloy Steel iron Excellent Performance - More driver comfort - Less wear and tear - Reduce bounce Easy to replace - Easy bolt-on installation requires no modification