6-Inch Lift Kit with N3 Shocks for Chevy & GMC 4WD (1977–1991)
- Fits 1977–1991 Chevy K30/K3500 and GMC K35/K3500 4WD — check the full fitment list for your year and trim
- Front: lifted leaf springs, Dana 60 steering block, brake line relocation brackets, U-bolts and hardware
- Rear: add-a-leaf springs, 4-inch lift blocks, U-bolts and hardware
- N3 series shocks valved for the application
- Extended brake lines advisable; add drop brackets if the truck has a front sway bar
- Install time listed at 6 - 8 hours; downloadable installation guide available. Shipping weight: 190 lb
The Trail Fortress check
Will it fit your truck?
✓ Fits
Extended brake lines are recommended. If vehicle is equipped with a front sway-bar drop brackets are recommended. (#1019) Fitment on this page is based on the manufacturer’s application data.
About this kit
6-Inch Lift Kit with N3 Shocks, fitment-checked
Rough Country 251.20 is a 6-inch lift kit for 1977–1991 Chevy K30/K3500 and GMC K35/K3500 4WD trucks listed in the fitment section. It combines lifted front leaf springs, a Dana 60 steering block, and brake line relocation brackets up front with add-a-leaf springs and 4-inch lift blocks in back, plus application-valved N3 series shocks.
This 6-inch lift kit covers the 1977–1991 Chevy K30/K3500 and GMC K35/K3500 4WD applications shown in the fitment table, spanning Custom Deluxe, Scottsdale, Silverado, Cheyenne, and Sierra Classic trims. Front hardware includes lifted leaf springs, a Dana 60 steering block, brake line relocation brackets, and U-bolts; the rear uses add-a-leaf springs with 4-inch lift blocks and its own U-bolt set. Extended brake lines are advisable, and trucks running a front sway bar should also plan on drop brackets. Rough Country lists the job at 6 - 8 hours, and a downloadable installation guide is available before you start.
What’s in the box
Kit contents
- 1× Add-A-Leaf Spring Kit 6112
- 2× 6in Front Leaf Spring 8015
- 1× 251.20 Box Kit 125130
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 251.20 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 251.20 |
| UPC / GTIN | 00843030128319 |
| Lift height | 6 in |
| Shock package | N3 series |
| Shipping weight | 190 lb |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here