SPL Parts Solid Subframe Bushing Kit - 1999-2005 Porsche 911 (996)Subframe Bushings for the 1999 2005 Porsche 911 (996) 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