Take your 1977-1987 Chevy and GMC 3/4 ton truck or SUV to the next level with this 4-inch lift kit from BDS Suspension. Designed to improve stance, performance, and capability of the K20 and K25, this kit includes everything necessary to set your truck up right with clearance for up to 35 inch Tires.
Up front the lift kit includes Glide-Ride leaf springs, 4 inch steering arm for steering correction, brake line brackets and precision tuned NX2 nitrogen charged shocks. In the rear this kit utilizes a high-strength lift block, longer u-bolts and a matching set of NX2 Nitro shocks.
Glide-Ride Leaf Springs
Built to outperform, BDS engineered the Glide-Ride leaf springs into a multi-leaf progressive spring rate design that provides a smooth ride with any load. This is accomplished with an exclusive triple-stage leaf spring design. Upgrading to BDS Glide-Ride leaf springs will provide flexibility throughout the suspension cycle.
Rear Lift Option 4 Inch Block Kit
4 Inch Block Kit with Add-A-Leaf
Leaf Springs
Shock Option NX2 Nitro Series
FOX 2.0 Performance Series
Features:
- Easy, 100 percent Bolt-on installation
- Glideride leaf springs to provide full lift height and increased capacity
- New steering arm maintains proper steering angles for improved handling
- Cast steel blocks and add-a-leaf provide level stance from front to rear
- Standard NX2 Nitro shocks with vehicle-specific valving for better control
- Upgrade to FOX 2.0 Performance Series shocks for maximum performance on and off-road
- Included in the base system.
- Made of cast iron for high strength.
- Designed to provide correct pinion angles.
- Help freshen up old worn-out factory leaf springs.
- Provides an additional 1 inch of lift.
- Includes new center pins.
- Eliminates any need for a lift block.
- Reduces axle wrap and creates a more controlled and stable feel.
- Multi-leaf progressive design for a smooth ride.
- Maintains factory payload weight ratings.
- Nitrogen-charged
- Twin-tube design
- 10-stage velocity-sensitive valving
- Dual-welded ends for increased strength
- 1-3/8-inch high-flow piston
- Self-lubricating seals
- Silver powder coat finish
- 2-inch Impact extruded aluminum body
- Internal floating piston (Internal Floating Piston) monotube design
- CNC machined 6061-T6 aluminum mounting ends
- Massive 5/8-inch hard chrome plated heat-treated alloy steel shaft
- Race-developed high-flow piston design
- Application-specific valving to maximize performance
- Long-lasting clear anodized finish
Fitment Notes (from BDS):
- 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, be sure to 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 vehicle 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 come with OE style rubber bushings installed.
- Exhaust modification may be required to clear front driveshaft.
Specifications:
- Lift Height: 4.0 Inch
- Front Lift Height: 4.0 Inch
- Rear Lift Height: 4.0 Inch
- Drive: 4WD
- Warranty: Lifetime Replacement Warranty Extends to Cover all BDS Hard Parts
Options & Part Numbers:
| Option |
Part # |
Shocks Included |
What's in the Box |
| 4 Inch Block Kit / FOX 2.0 Performance Series |
BDS124FS |
Yes |
two BDS001401, 73-91 GM 4in Front Spring
one BDS011001, 77-87 GM Front Box Kit (3.00 dia. front)
one BDS011408, GM 3/4 ton 4in Rear Box Kit
one BDS081401, 69-91 GM 4 Steering Arm
two FOX98224620, Fox 2.0 Shock 23.65 x 15.05 x 2- EB1/EB1
two FOX98224639, Fox 2.0 Shock 30.05 x 18.45 x 2- EB1/EB1 |
| 4 Inch Block Kit / NX2 Nitro Series |
BDS124H |
Yes |
two BDS001401, 73-91 GM 4in Front Spring
one BDS011001, 77-87 GM Front Box Kit (3.00 dia. front)
one BDS011408, GM 3/4 ton 4in Rear Box Kit
one BDS081401, 69-91 GM 4 Steering Arm
two BDS85620, Shock- 23.10 x 14.25 x 2-3/8 - EB1/EB1
two BDS85639, Shock- 29.70 x 17.60 x 2-3/8 - EB1/EB1 |
| 4 Inch Block Kit with Add-A-Leaf / FOX 2.0 Performance Series |
BDS126FS |
Yes |
two BDS001401, 73-91 GM 4in Front Spring
one BDS011001, 77-87 GM Front Box Kit (3.00 dia. front)
one BDS011208, GM 3/4 ton 2 Inch Rear Box Kit
one BDS081401, 69-91 GM 4 Steering Arm
one BDS119157, GM/Dodge Rear Long Add-a-leaf
two FOX98224620, Fox 2.0 Shock 23.65 x 15.05 x 2- EB1/EB1
two FOX98224639, Fox 2.0 Shock 30.05 x 18.45 x 2- EB1/EB1 |
| 4 Inch Block Kit with Add-A-Leaf / NX2 Nitro Series |
BDS126H |
Yes |
two BDS001401, 73-91 GM 4in Front Spring
one BDS011001, 77-87 GM Front Box Kit (3.00 dia. front)
one BDS011208, GM 3/4 ton 2 Inch Rear Box Kit
one BDS081401, 69-91 GM 4 Steering Arm
one BDS119157, GM/Dodge Rear Long Add-a-leaf
two BDS85620, Shock- 23.10 x 14.25 x 2-3/8 - EB1/EB1
two BDS85639, Shock- 29.70 x 17.60 x 2-3/8 - EB1/EB1 |
| Leaf Springs / FOX 2.0 Performance Series |
BDS128FS |
Yes |
two BDS001401, 73-91 GM 4in Front Spring
two BDS001408, GM 3/4 ton 4in Rear Spring-56 eye-to-eye
one BDS011001, 77-87 GM Front Box Kit (3.00 dia. front)
one BDS081401, 69-91 GM 4 Steering Arm
two FOX98224620, Fox 2.0 Shock 23.65 x 15.05 x 2- EB1/EB1
two FOX98224639, Fox 2.0 Shock 30.05 x 18.45 x 2- EB1/EB1
four UBT4032, 5/8 x 3-5/8 x 10 Round U-bolt |
| Leaf Springs / NX2 Nitro Series |
BDS128H |
Yes |
two BDS001401, 73-91 GM 4in Front Spring
two BDS001408, GM 3/4 ton 4in Rear Spring-56 eye-to-eye
one BDS011001, 77-87 GM Front Box Kit (3.00 dia. front)
one BDS081401, 69-91 GM 4 Steering Arm
two BDS85620, Shock- 23.10 x 14.25 x 2-3/8 - EB1/EB1
two BDS85639, Shock- 29.70 x 17.60 x 2-3/8 - EB1/EB1
four UBT4032, 5/8 x 3-5/8 x 10 Round U-bolt |
Fits:
- 1987 Chevrolet Blazer
- 1977-1986 Chevrolet K20
- 1977-1986 Chevrolet K20 Suburban
- 1977-1986 Chevrolet K5 Blazer
- 1987 Chevrolet V20
- 1987 Chevrolet V20 Suburban
- 1977-1987 GMC Jimmy
- 1977-1978 GMC K25
- 1977-1978 GMC K25 Suburban
- 1979-1986 GMC K2500
- 1979-1986 GMC K2500 Suburban
- 1987 GMC V2500
- 1987 GMC V2500 Suburban
Part #: BDS124FS, BDS124H, BDS126FS, BDS126H, BDS128FS, BDS128H
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