Full Set of 4 Coil-over Shock Absorbers. Front and Rear, Left and Right. Replaces OEM# AM137958 AM137957. Why a Complete Quick Replacment Strut? The “Why”: Safety and the ease of installation! These units come pre-loaded with the coil spring (where applicable), boot, bumper kit, spring seat, isolator and strut mount. There are no special tools required and they are vehicle specific as per application for a direct fit ready to install. Brand New Struts/Shocks from a Major Auto Parts Distributor in North America. Made to OE quality standards and performance. High corrosion resistance and long service life. Steel rod is mirco-polished with double chrome plate. Newer Valving technology operates in stages based on the velocity of the car. Use Teflon bonded piston seal to keep friction down and temperature cooler so that valving stays firmer. All-around welding on the spring seat. Piston seal is provided by an OE Supplier. For International or other US territories, additional charges apply. We will replace any parts supplied by us that in our opinion are proven defective. We are not responsible for items when subjected to abuse (off-road, competitions), commercial use, improper installation, accident, or normal wear. Must contact Axlestore for return authorization number. When to replace worn shocks or struts? There are four main reasons that determine when to replace them: 1 To upgrade performance; 2 to restore the vehicle’s designed performance (usually after 50,000 miles); 3 when the vehicle has excessive ride control conditions i. Nose dive, body roll, etc. ; or 4 when the vehicle has a failed unit i. Dripping hydraulic fluid, tire cupping, excessive bounce, etc. Testing has shown that original equipment gas-charged shocks and struts degrade measurably by 50,000 miles. Unlike a tire, which rotates a specific number of times per mile, a shock absorber or strut may compress and extend several times per mile on a smooth road, or several hundred times per mile on a very rough road. There are other factors that affect the life of a shock or strut, such as, regional weather conditions, amount and type of road contaminates, driving habits, loading of the vehicle, tire / wheel modifications, and the general mechanical condition of the suspension and tires. Why to replace worn shocks or struts? Performance degrades slowly over time. When shocks and struts aren’t controlling tire and body movement very well due to wear, all ride control conditions are affected. Stopping ability will be reduced. Tire performance is reduced and because of excessive movement, all other attached steering & suspension components are affected. We carry a wide range of shocks and struts. Every shocks and struts we carry is TS16949 certified. They are made to meet or exceed OEM quality. If you couldn’t find the item you need, please send us a message. Thank you for your business and we are happy to serve you as our valued customer! We strive to provide excellent customer service and satisfaction with our products. We look forward to the opportunity of resolving your concerns!