Improve the style and handling of your 1977-1987 Chevy and GMC 1/2 ton truck or SUV with this 4-inch lift kit from BDS Suspension. Designed to improve stance, performance, and capability of the K5 Blazer, K10 and K15, 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 SpringsBuilt 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.
Features & Benefits
Recommended Tires & Wheels
Rear Lift Option
Shock Option
FOX 2.0 Performance Series
Front Lift Method : Leaf SpringRear Lift Method : BlocksShocks Included : YesFront Lift Height : 4 inchRear Lift Height : 4 inch
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
- (Trimming may be required)
- 35 x 12.5 with 15 x 8 and 3.5 in. Backspace
- 4 Inch Block Kit
- Included in the base system.
- Made of cast iron for high strength.
- Designed to provide correct pinion angles.
- 4 Inch Block Kit with Add-A-Leaf
- Help freshen up old worn-out factory leaf springs.
- Provides an additional 1 inch of lift.
- Includes new center pins.
- 2-inch Impact extruded aluminum body
- Internal floating piston (IFP) 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
- 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
- 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.
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 |
BDS123FS |
Yes |
two BDS001401, 73-91 GM 4in Front Spring
one BDS011001, 77-87 GM Front Box Kit (3.00 dia. front)
one BDS011409, GM 1/2 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 |
BDS123H |
Yes |
two BDS001401, 73-91 GM 4in Front Spring
one BDS011001, 77-87 GM Front Box Kit (3.00 dia. front)
one BDS011409, GM 1/2 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 |
BDS125FS |
Yes |
two BDS001401, 73-91 GM 4in Front Spring
one BDS011001, 77-87 GM Front Box Kit (3.00 dia. front)
one BDS011209, GM 1/2 ton 2 Inch Rear Box Kit
one BDS011408, GM 3/4 ton 4in 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 |
BDS125H |
Yes |
two BDS001401, 73-91 GM 4in Front Spring
one BDS011001, 77-87 GM Front Box Kit (3.00 dia. front)
one BDS011209, GM 1/2 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 |
BDS127FS |
Yes |
two BDS001401, 73-91 GM 4in Front Spring
two BDS001409, GM 1/2 ton 4in Rear Spring-52 eye-to-eye
one BDS011001, 77-87 GM Front Box Kit (3.00 dia. front)
one BDS011009, 73-91 GM Rear Box Kt (w/BDS 52in spring)
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 |
| Leaf Springs / NX2 Nitro Series |
BDS127H |
Yes |
two BDS001401, 73-91 GM 4in Front Spring
two BDS001409, GM 1/2 ton 4in Rear Spring-52 eye-to-eye
one BDS011001, 77-87 GM Front Box Kit (3.00 dia. front)
one BDS011009, 73-91 GM Rear Box Kt (w/BDS 52in spring)
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 |
Fits:
- 1987 Chevrolet Blazer
- 1977-1986 Chevrolet K10
- 1977-1986 Chevrolet K10 Suburban
- 1977-1986 Chevrolet K5 Blazer
- 1987 Chevrolet V10
- 1987 Chevrolet V10 Suburban
- 1977-1987 GMC Jimmy
- 1977-1978 GMC K15
- 1977-1978 GMC K15 Suburban
- 1979-1986 GMC K1500
- 1979-1986 GMC K1500 Suburban
- 1987 GMC V1500
- 1987 GMC V1500 Suburban
Part #: BDS123FS, BDS123H, BDS125FS, BDS125H, BDS127FS, BDS127H
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