This 4" IFS lift kit takes advantage of the stock suspension design to maintain comfort and handling characteristics and allows for 35-37" tires. The stock equipped strut lift is integrated to net 4" of lift, providing final ride height similar to that of a standard GM1500 equipped with a full 6" IFS lift kit. At the heart of this kit is a pair of 1/4" thick drop crossmembers that repositions the stock lower control arms. A differential skid plate reinforces the subframe while adding protection for critical steering and driveline components. Upgraded steering knuckles maintain proper steering geometry and ESC system compatibility and allow for 17" or larger aftermarket wheels to be installed - as well as the stock 20" wheels. The front differential is secured using multipoint differential relocation brackets to keep the CV axle operating angle changes to a minimum. Lift comes from a set of top-mounted, steel fabricated strut spacers built specifically for Trail Boss/AT4 strut assemblies that retain the stock ride quality and allow for easy installation without the need to disassemble the factory struts. A pair of sway bar drop brackets are used to correct the operating angle of the factory sway bar and create a strong brace between the rear crossmember and frame. In the rear, 5" lift blocks and longer U-bolts lift and level without requiring stacking lift blocks. Rear brake / ABS line brackets allow the use of factory brake lines.