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  5. 4 Inch Lift Kit - #RCS18030

4 Inch Lift Kit Suspension Lift Kit Rough Country #RCS18030

Transform Your Truck's Stance and Capability: Upgrade your GM truck from front to back with Rough Country's 4" 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 features application-specific front and rear lifted leaf springs, delivering increased ground clearance without compromising ride comfort or control. By eliminating rear lift blocks, the kit ensures consistent lift and improved suspension geometry, resulting in a smooth, factory-like ride. Brake line brackets are also included to maintain proper alignment and safety throughout the suspension travel. 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 4" lift offers enough clearance to run up to a 35" tall tire with proper backspacing, giving your truck the rugged stance it deserves. Limited Lifetime Warranty: Rough Country backs this kit with a Limited Lifetime Warranty, giving you long-term confidence on and off the road.

ONLY fits models with 52" rear leaf springs. If vehicle is equipped with a front sway-bar, drop brackets are recommended SKU: 1019. Rear Spring Measurement: To confirm rear spring size a measurement will have to be pulled from eyelet to eyelet. For a visual, please click here.

Rough Country is proudly American-born and based. Our products are designed, engineered, tested, and assembled in the USA. Were committed to delivering the quality, reliability, and performance American drivers expect, whether theyre hitting the pavement or heading off the grid. While some materials are sourced globally, our foundation, focus, and operations remain right here at home.

Application-Specific Front & Rear Leaf Springs: Engineered for a perfect fit and optimal ride quality.

Premium N3 Series Shocks: Includes application-valved N3 shock absorbers for balanced on-road comfort and off-road control.

  • ONLY fits models with 52" rear leaf springs.
  • If vehicle is equipped with a front sway-bar, drop brackets are recommended. (#1019)
  • Optional steering arm only fits models with 3-bolt open knuckle steering.
  • Installation Time: 6 - 8 hours
  • Tire Info: 315/70R17:17x9:6x5.5:-12:-
  • 315/70R17:17x9:6x5.5:+0:-
  • 315/65R18:18x9:6x5.5:-12:-
  • 315/55R20:20x9:6x5.5:-6:-

The E-Custom Difference

  • Ships in Multiple Boxes Y
  • Shipping Options No Restrictions
  • Tire, Wheel, and Offset Info 35x12.50R15:15x8:6x5.5:-19:-; 35x12.50R15:15x10:6x5.5:-38:-; 35x12.50R16:16x8:6x5.5:-19:-; 35x12.50R17:17x8.5:6x5.5:+0:-; 315 70R17:17x8.5:6x5.5:+0:-; 35x12.50R17:17x8.5:6x5.5:+1:-; 35x12.50R17:17x9:6x5.5:-12:-; 315 70R17:17x9:6x5.5:-12:-; 315 70R17:17x9:6x5.5:-6:-; 35x12.50R17:17x9:6x5.5:+0:-; 315 70R17:17x9:6x5.5:+0:-; 35x12.50R17:17x9:6x5.5:+1:-; 35x12.50R18:18x8.5:6x5.5:+0:-; 285 75R18:18x8.5:6x5.5:+0:-; 35x12.50R18:18x8.5:6x5.5:+1:-; 35x12.50R18:18x9:6x5.5:-12:-; 285 75R18:18x9:6x5.5:-12:-; 285 75R18:18x9:6x5.5:-6:-; 35x12.50R18:18x9:6x5.5:+0:-; 285 75R18:18x9:6x5.5:+0:-; 35x12.50R18:18x9:6x5.5:+1:-; 35x12.50R20:20x9:6x5.5:-12:-; 295 65R20:20x9:6x5.5:-12:-; 295 60R20:20x9:6x5.5:-12:-; 295 65R20:20x9:6x5.5:-6:-; 35x12.50R20:20x9:6x5.5:+0:-; 295 65R20:20x9:6x5.5:+0:-; 295 60R20:20x9:6x5.5:+0:-; 35x12.50R20:20x9:6x5.5:+1:-; 295 60R20:20x9:6x5.5:+1:-; 35x12.50R20:20x10:6x5.5:-25:-; 295 60R20:20x10:6x5.5:-25:-; 35x12.50R20:20x10:6x5.5:-24:-; 295 60R20:20x10:6x5.5:-24:-; 35x12.50R20:20x10:6x5.5:-19:-; 295 60R20:20x10:6x5.5:-19:-; 35x12.50R20:20x10:6x5.5:-18:-; 295 60R20:20x10:6x5.5:-18:-; 35x12.50R22:22x10:6x5.5:-25:-; 35x12.50R22:22x10:6x5.5:-24:-; 35x12.50R22:22x10:6x5.5:-19:-; 35x12.50R22:22x10:6x5.5:-18:-
  • Tire Info 35x12.50R15:15x8:6x5.5:-19:-;35x12.50R15:15x8:6x5.5:-18:-;35x12.50R16:16x8:6x5.5:-12:-;35x12.50R16:16x8:6x5.5:-6:-;305/70R17:17x8.5:6x5.5:-12:-;285/75R17:17x8.5:6x5.5:-12:-;35x12.50R17:17x8.5:6x5.5:+0:-;315/70R17:17x8.5:6x5.5:+0:-;305/70R17:17x8.5:6x5.5:+0:-;35x12.50R17:17x8.5:6x5.5:+1:-;315/70R17:17x8.5:6x5.5:+1:-;305/70R17:17x8.5:6x5.5:+1:-;35x12.50R17:17x9:6x5.5:-19:-;315/70R17:17x9:6x5.5:-19:-;305/70R17:17x9:6x5.5:-19:-;285/75R17:17x9:6x5.5:-19:-;35x12.50R17:17x9:6x5.5:-18:-;315/70R17:17x9:6x5.5:-18:-;305/70R17:17x9:6x5.5:-18:-;285/75R17:17x9:6x5.5:-18:-;35x12.50R17:17x9:6x5.5:-12:-;315/70R17:17x9:6x5.5:-12:-;305/70R17:17x9:6x5.5:-12:-;35x12.50R17:17x9:6x5.5:+0:-;315/70R17:17x9:6x5.5:+0:-;305/70R17:17x9:6x5.5:+0:-;35x12.50R17:17x9:6x5.5:+1:-;315/70R17:17x9:6x5.5:+1:-;305/70R17:17x9:6x5.5:+1:-;35x12.50R18:18x8.5:6x5.5:+0:-;295/70R18:18x8.5:6x5.5:+0:-;285/75R18:18x8.5:6x5.5:+0:-;35x12.50R18:18x8.5:6x5.5:+1:-;295/70R18:18x8.5:6x5.5:+1:-;285/75R18:18x8.5:6x5.5:+1:-;35x12.50R18:18x9:6x5.5:-12:-;295/70R18:18x9:6x5.5:-12:-;285/75R18:18x9:6x5.5:-12:-;35x12.50R18:18x9:6x5.5:+0:-;295/70R18:18x9:6x5.5:+0:-;285/75R18:18x9:6x5.5:+0:-;35x12.50R18:18x9:6x5.5:+1:-;295/70R18:18x9:6x5.5:+1:-;285/75R18:18x9:6x5.5:+1:-;295/70R18:18x10:6x5.5:-25:-;295/70R18:18x10:6x5.5:-19:-;295/70R18:18x10:6x5.5:-18:-;35x12.50R20:20x9:6x5.5:-12:-;295/65R20:20x9:6x5.5:-12:-;295/60R20:20x9:6x5.5:-12:-;35x12.50R20:20x9:6x5.5:+0:-;295/65R20:20x9:6x5.5:+0:-;295/60R20:20x9:6x5.5:+0:-;35x12.50R20:20x9:6x5.5:+1:-;295/65R20:20x9:6x5.5:+1
  • Tire Info 295/60R20:20x9:6x5.5:+1:-;35x12.50R20:20x10:6x5.5:-25:Minor Trimming;295/60R20:20x10:6x5.5:-25:Minor Trimming;35x12.50R20:20x10:6x5.5:-19:Minor Trimming;295/60R20:20x10:6x5.5:-19:Minor Trimming;35x12.50R20:20x10:6x5.5:-18:Minor Trimming;295/60R20:20x10:6x5.5:-18:Minor Trimming;35x12.50R20:20x12:6x5.5:-44:Trimming Required;35x12.50R22:22x10:6x5.5:-25:Minor Trimming;285/55R22:22x10:6x5.5:-25:-;35x12.50R22:22x10:6x5.5:-19:Minor Trimming;285/55R22:22x10:6x5.5:-19:-;35x12.50R22:22x10:6x5.5:-18:Minor Trimming;285/55R22:22x10:6x5.5:-18:-;35x12.50R22:22x12:6x5.5:-44:Trimming Required
  • Front Components Lifted Leaf Springs/Brake Line Relocation Brackets/U-Bolts/Hardware
  • Prop 65 (C, R, or CR) CR
  • Utv Product N
  • Shipping Group No Restrictions
  • Rear Components Lifted Leaf Springs/U-Bolts/Hardware
  • Title Rough Country - 4 Inch Lift Kit - RR Spring - Chevy/GMC C10/K10 C15/K15 Truck/Half-Ton Suburban (69-72)
  • Category Susp Lift Kits 4wd
  • Install Time 6 - 8 hours
  • Prop 65 Yes/No Yes
  • Prop 65 (C, R or CR) CR
  • Prop 65 - Short Label WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
  • Prop 65 Warning Label Warning - Both Cancer and Reproduction.JPG
  • Installation Time 6-8 hours
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