Rough Country 145.20 4 Inch Lift Kit Chevy GMC C10 K10 Truck SUV K5 Blazer 4WD (1977-1991)

Transform Your Truck's Stance and Capability: Upgrade your GM truck from front to back with Rough Country's 4in Suspension Lift Kit. This premium lift delivers a leveled, aggressive look while enhancing ride height and off-road readiness all with an easy bolt-on installation.

Engineered for Superior Ride Quality: This kit includes application-specific front lifted leaf springs, delivering increased ground clearance without sacrificing ride comfort or control. Rear lift blocks and brake line brackets maintain proper geometry, ensuring a smooth, factory-like ride after installation. For a complete suspension upgrade, the kit is also available with replacement rear lifted leaf springs, offering consistent rear lift and eliminating the need for lift blocks.

Enhanced Performance with N3 Series Shocks: Rough Country's N3 series shocks come standard valved for your exact application and designed to provide a perfect balance of on-road smoothness and off-road capability. Featuring a 10-stage variable valving system, high-pressure nitrogen charge, and durable 54mm shock body with 18mm piston rod, these shocks are built for performance and longevity.

Room for Bigger Tires: Make room for aggressive wheel and tire combos. This 4in lift offers enough clearance to run up to a 35in tall tire with proper backspacing, giving your truck the rugged stance it deserves.

Improved Steering and Handling: To maintain proper drivability, a raised steering arm is included correcting steering geometry for tight, responsive handling after the lift.

This listing is Rough Country part number 145.20: 4 Inch Lift Kit | Chevy/GMC C10/K10 Truck & SUV/K5 Blazer 4WD (1977-1991) (Select Rear Configuration: Lift Blocks).

Features

• Boosted Ground Clearance: Gain the extra height needed for better off-road capability and obstacle clearance
• Application-Specific Front Leaf Springs: Engineered for a perfect fit and optimal ride quality
• Optional Rear Leaf Springs: Available with replacement rear springs for a complete suspension upgrade
• Clears 35-Inch Tires: Provides ample room to run up to a 35in tall tire with no rubbing
• Raised Steering Arm Included: Corrects steering geometry for precise handling and improved alignment
• Premium N3 Series Shocks: Includes application-valved N3 shock absorbers for balanced on-road comfort and off-road control

Specifications

• Part Number: 145.20
• Select Rear Configuration: Lift Blocks
• Est. Install Time: 6-8 hours

Fitment

• 1987-1991 Chevy Blazer 4WD
• 1977-1986 Chevy K10/K5 Blazer 4WD
• 1987 Chevy V10 4WD
• 1987-1988 Chevy V10 Suburban 4WD
• 1989-1991 Chevy V1500 Suburban 4WD
• 1977-1991 GMC Jimmy 4WD
• 1977-1978 GMC K15 4WD
• 1979-1986 GMC K1500 4WD
• 1987 GMC V1500 4WD
• If vehicle is equipped with a front sway-bar, drop brackets are recommended SKU: 1019
• Optional Rear Springs: To confirm rear spring size a measurement will have to be pulled from eyelet to eyelet. For a visual, please click here.
• Vehicles with factory quad shocks (2 front shocks per side) will simply use a single aftermarket shock

What’s Included

• Front: Lifted Leaf Springs
• Front: Steering Arm
• Front: Brake Line Relocation Brackets
• Front: U-Bolts
• Front: Hardware
• Rear: 4in Lift Blocks
• Rear: U-Bolts
• Rear: Hardware
• Shocks: (4) Premium N3 Shock Absorbers