Tapped Zerk Fitting Holes: The zerk fitting holes are tapped/threaded for a secure fit, preventing any dislodging during use. 2x Rear Lowering Shackles. Transform your driving experience with our premium adjustable shackle kits designed specifically for the 1999-2019 Silverado 1500 (2WD and 4WD, 6-Lug only).
