BDS 4 Inch Lift Kit | 1977-1987 Chevy/GMC 3/4 Ton Truck & Suburban 4WD | 4 Inch Block Kit | NX2 Nitro Series

Configured with a 4 Inch Block Kit rear lift and NX2 Nitro Series shocks. The rear block kit uses cast iron blocks designed to provide correct pinion angles. NX2 shocks feature a nitrogen-charged twin-tube design, 10-stage velocity-sensitive valving, dual-welded ends, a 1-3/8-inch high-flow piston, self-lubricating seals, and a silver powder coat finish.

Overview

This 4-inch lift kit from BDS Suspension is designed for 1977–1987 Chevy and GMC 3/4 ton trucks and SUVs (K20, K25) to improve stance, performance, and capability. The kit includes clearance for up to 35-inch tires and contains everything needed for a complete installation. Up front, it features Glide-Ride leaf springs, a 4-inch steering arm for steering correction, brake line brackets, and precision-tuned shocks. The rear lift is available in block kit, block kit with add-a-leaf, or full leaf spring configurations, each paired with longer u-bolts and matching rear shocks.

BDS Glide-Ride leaf springs use an exclusive triple-stage, multi-leaf progressive spring rate design that provides a smooth ride under any load while maintaining factory payload weight ratings.

Features

• 100% bolt-on installation
• Glide-Ride leaf springs provide full lift height and increased capacity
• New 4-inch steering arm maintains proper steering angles for improved handling
• Cast steel blocks and available add-a-leaf provide a level stance from front to rear
• NX2 Nitro shocks with vehicle-specific valving included as standard
• FOX 2.0 Performance Series shock upgrade available for maximum on- and off-road performance
• Brake line brackets included
• Fitment for up to 35-inch tires

Specifications

• Lift Height: 4 inches
• Front: Glide-Ride multi-leaf progressive leaf springs, 4-inch steering arm, brake line brackets
• Rear: High-strength lift block with longer u-bolts (block kit option); add-a-leaf providing an additional 1 inch of lift with new center pins (add-a-leaf option); or full Glide-Ride rear leaf springs (leaf spring option)
• Rear leaf springs: Multi-leaf progressive design, maintains factory payload weight ratings
• Cast iron rear blocks for correct pinion angles (block kit options)
• NX2 Nitro Shocks: Nitrogen-charged twin-tube design, 10-stage velocity-sensitive valving, dual-welded ends, 1-3/8-inch high-flow piston, self-lubricating seals, silver powder coat finish
• FOX 2.0 Performance Series Shocks (upgrade): 2-inch impact extruded aluminum body, internal floating piston (IFP) monotube design, CNC machined 6061-T6 aluminum mounting ends, 5/8-inch hard chrome plated heat-treated alloy steel shaft, race-developed high-flow piston, application-specific valving, clear anodized finish

Installation

• Estimated Time: 4 hours
• Difficulty: Moderately Easy
• Tools Required: Ball Joint Separation Tool, Cut-off Tool

Important Notes

• The 3/4 ton commonly came with a factory 56-inch eye-to-eye rear leaf spring. However, some were produced with a 52-inch rear spring. If ordering rear leaf springs, measure your factory rear spring before ordering.
• If equipped with a factory front sway bar, a sway bar drop kit is available in the accessories section.
• Some vehicles came with factory front dual shocks. If you wish to replace the factory duals, you must order the additional two auxiliary shocks in the options.
• #001408 comes with OE style rubber bushings installed.
• Exhaust modification may be required to clear the front driveshaft.