Superlift K423 8" Suspension Lift Kit

Superlift K423 8
891.41In stock

1973-1991 Chevrolet GMC Suburban 1500

Regular Price $990.45
Special Price $891.41
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Product Details

This 8" Superlift'suspension system consists of American Made Heavy Duty (HD) front 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 and brake line relocation brackets.

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 and a 4" adjustable drag link. The kit is packaged complete with Superlift'superide Nitro shocks.

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

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1973-19874WDChevrolet1500 Pickup
1973-19914WDChevrolet1500 Suburban
1973-19874WDGMC1500 Pickup
1973-19914WDGMC1500 Suburban


  • Heavy Duty Front 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.
  • Brake line / hose relocating hardware included in kit box.
  • Both driveshafts need to be lengthened.
  • 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.
  • Vehicles with 56" long rear spring can use spring if shackle hanger is relocated on frame for 52" long application.
  • 88-91 Blazer, Jimmy, and Suburban require additional sleeve kit part # 315-88.
  • If the vehicle is factory-equipped with auxiliary (dual) front shocks also order quantity two, part number 85150 Superide shocks.


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