1REFERENCE OEM: The replacement OEM of rear upper spring seat is 9813335040 Replacement for Boxster 20092011, easy to install, bring you convenience. 2IMPROVE STABILITY: Comprehensively improve the stability of car driving, thereby enhancing driver driving sense of smoothness and making drivers safer when driving. 3SHOCK ABSORPTION: Rear spring seat can effectively reduce the vibration of the body, absorb some noise of the suspension system, reduce the tire noise of the car, and improve the driving comfort of the car. 4HIGH PERFORMANCE: After a variety of performance tests at the factory, it meets or exceeds OEM standards and has high reliability, making it an ideal replacement for the old or broken one. 5PUR MATERIAL: Made of PUR material, safe and eco friendly, not easy to be damaged and has strong toughness, which can ensure its stable use for a long time in harsh environments.