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 weight2 x 3 crossmember - Mandrel formed for uniform profile; 3.5 drop center makes it adaptable virtually any chassis design; 60 wideDiagonal Link - 3/4 O.D. DOM steel with 1/2 Spherical Rod Ends for easy on-chassis adjustmentDriveshaft Loop - 1-1/8 O.D. mandrel formed Round Tube contains driveshaft during U-joint failureShock Crossmember - Tubular design provides high strength with light weightUpper & Lower Shock Mounts - Provides 6 of ride height adjustmentMagnum Series 4-Link Kit Part No. C2028 - Designed for ultra-high horse-powered race cars offers enhanced adjustability over a ladder bar suspension for increased performance12-Way Adjustable Coilover 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 bearingsSprings - 2.5 I.D. x 12 long premium-grade chrome silicone steel powder coated for durability. Progressive Rate Springs for a vehicle with an overall weight range of 1 900-2 900 lbs.