Depending on the flip kit, notch your frame to give that extra travel you need for a slammed ride. Welding may be required for installation of any c-notch kit; be sure to pickup a bag of hardware to make your notch bolt-on. 4 inch drop flip kits do not use a frame notch; 2 inch lift shackles are included in the 4 inch flip kits. AXLE FLIP (provides a 6-inch...