Bilsteins are original equipment on many Porsches and have won, for Porsche, countless races. Bilsteins are the highest quality shocks made and will last the lifetime of your Porsche. Bilstein heavy-duty shocks and struts provide improved handling and stability without sacrificing the ride. Their superior damping ability makes them ideal for spirited driving while still maintaining an exceptional street feel. As with all bilsteins, these units instantaneously self-adjust to changing road surfaces. In addition, their performance does not gradually decline from age, use or heat - requiring no compensating manual adjustments as with conventional multi-tube units. Sold each, two needed for the rear of your vehicle.