The all-new 4.5" Coil Spring Lift Kits allow for even more ground clearance while going to a 37" tire.   Springing up to the new 4.5" lift yields all the bells and whistles of a big 6" kit but at a slightly lower garage-able stance.   These kits come with heavy-duty steel radius arm drop brackets heavy-duty fabricated steel front track bar brackets forged dropped pitman arm sway bar relocation brackets and bump stop extensions preventing over-compression of the included Falcon 1.1 Monotube front & rear shocks.   The 4.5" Ram HD kit includes our unique CNC-machined 6061-T6 billet Aluminum Driveline Indexing System (DIS) that re-clocks the transfer case to properly align the front output shaft for improved driveline angles.   The Ram 3500 HD comes with a high-output diesel engine DIS system.   Kit 49-19430 includes the new DIS re-positioning components heavy-duty and great riding 4.5" lift front springs 3" lift rear taper blocks heavy-duty radius arm drop brackets heavy-duty fabricated steel front track bar brackets dropped cast iron pitman arm front/rear sway bar relocation brackets and bump stop extensions preventing over-compression of the new Falcon 1.1 Monotube front/rear shocks. *Kit will not fit any models with the standard output 6.7L diesel motor HEMI Gasoline engine dually models Classic models and any automatic-leveling rear air suspension models.