Frame Kit, 4 Link, 28 Inch, Coil Over Shock Mount, 1050-1150 lbs Coil Springs, Made to Order4-Link Frame Kit, 28" Width, 12-Way Adj. Coil-Over Shock,100 lb Spring Rate. Frame Kit comes with the following items; • 4-Link Frame Rails - Specially engineered profile clears suspension and axle components while accommodating low ride height and wide tires; Rugged 2" x 3" construction makes them strong without adding unnecessary weight • 2" x 3" crossmember - Mandrel fromed for uniform profile; 3.5" drop center makes it adaptable virtually any chassis design; 60" wide • Diagonal Link - 3/4" O.D. DOM steel with 1/2" Spherical Rod Ends for easy, on-chassis adjustment • Driveshaft Loop - 1-1/8" O.D. mandrel formed Round Tube contains driveshaft during U-joint failure • Shock Crossmember - Tubular design provides high strength with light weight • Upper & Lower Shock Mounts - Provides 6" of ride height adjustment • 4-Link Kit, Part No. C2017 - Offers enhanced adjustability over a ladder bar suspension for increased performance • 12-Way Adjustable Coil-Over Shocks, Part No. C2770 - Externally adjustable with CNC machined billet aluminum threaded body that allows the included spring seats to be threaded up or down for preload and ride height, shocks also have 1" wide top/bottom bearings • Springs - Matched to your specific rear vehicle weight. 2.5" I.D x 12" long, premium-grade chrome silicone steel, powder coated for durability