Heavy duty performance lowering springs are the way to go when lowering your truck. These springs improve handling and performance. Rear springs are offered in 2, 3, 4, or 5 inch drop by themselves, and when used with Brothers lowering block kits you can achieve up to a 5-1/2 or 6-1/2 inch drop. (Note: when lowering more than 4 in the rear, a c-notch must be used for proper frame to axle tube clearance). Lowered shocks are recommended with all lowering coils. Rear axle bumpers - lowered rear gas shocks rear lowered coils front gas shocks rear coil spring retainer set