Superlift K447 12" Suspension Lift Kit

Superlift K447 12
1307.48In stock

1973-1987 Chevrolet GMC 2500 3/4 Ton Suburban

Regular Price $1,452.75
Special Price $1,307.48
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Product Details

This 12" SuperLift suspension system consists of American Made Heavy Duty (HD) front and rear leaf springs with durable Poly spring bushings and Teflon inserts between each leaf to ensure a quiet and smooth ride. Replacement front u-bolts, front sway bar brackets, a front driveshaft spacer, brake hose relocation brackets and rear DOT braided stainless steel "bullet proof" brake line.

Rear add-a-leaf with 3" anti wrap lift blocks and u-bolt kit are used to lift the rear. In addition this system comes with a 4" raised steering arm to compensate for the added height, a 4" adjustable drag link finally a 3" raised steering block is included as well. The kit is packaged complete with Superlift Superide Nitro shocks.

Options include single and dual steering stabilizers, and a 4" rear shackle flip kit.

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1973-19874WDChevrolet2500 Pickup
1973-19914WDChevrolet2500 Suburban
1973-19874WDGMC2500 Pickup
1973-19914WDGMC2500 Suburban


  • Heavy Duty Front and Rear leaf springs
  • Durable Urethane spring eye bushings
  • Degree shim installed on the front springs to help driveline angle
  • Rear lift options include full replacement rear springs and a 3" block kit
  • Raised steering arm, raised steering block and drop drag link included
  • Sway bar drop brackets included
  • Rear brake hose included
  • Front driveshaft spacer available
  • Superlift Superide shock absorbers included
  • Lifetime Warranty
  • Satisfaction Guarantee

Important Notes

  • 1977.5-91 models require clearancing (machining) of the front driveshaft CV cluster to prevent binding. If vehicle has single exhaust, the cross-over pipe requires modification to clear front driveshaft.
  • Optional extended length brake hoses recommended.
  • Rear brake hose included in kit box.
  • Brake line / hose relocating hardware included in kit box.
  • This is a SwampRunner Series lift system that is intended primarily for off-road or exhibition use.
  • Reference the "Important Product Use" section of the Warranty for additional safety related information.
  • If the vehicle is factory-equipped with auxiliary (dual) front shocks also order quantity two, part number 85150 Superide shocks.
  • 88-91 Suburban models require additional part number 315-88 bushing sleeve kit.


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