SuperPro SPF5584K Front Lower Control Arm Inner Forward Bushing KitSuperPro SPF5584K Front Lower Control Arm Inner Forward Bushing Kit SuperPro's lifetime replacement bushing upgrade for your GMTT1XX Silverado or Sierra offer an OEM style steel shell and integrated washer design for a like for like straightfoward replacement but with a lifetime of maintenance free service backed by a lifetime warranty. Warranty: LifetimeFITMENT Front Lower Control Arm Inner Forward Bushing Kit works with the following vehicles. 2007