Subframe bushings are an important and active component in performance of the rear suspension due to the rear subframe being subjected to a significant amount of load from a multitude of sources. The OEM bushings are rubber which degrades over time and allows the subframe to move in response to acceleration, braking, cornering, and other inputs.Upgrading the tired rubber bushings in your Porsche with the SPL solid subframe bushings will connect you directly to the rear tire and lock down the subframe, providing the fast, accurate feedback and predictable handling you need to push the limit.Sold as a complete kit for one car.Made in the USA.