UMI Performance 1968-1972 GM A-Body Handling Package, 1S Lowering- Stage 3.5

Part Number: UMIABF806-1-R

UMI Performance 1968-1972 GM A-Body Handling Package, 1S Lowering- Stage 3.5

Part Number: UMIABF806-1-R

$3,827.95

In Stock

( Inventory updated: 06/06/2026 )

Estimated ship date: 2-3 business days

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1968-1972 GM A-Body Handling Package, 1S Lowering- Stage 3.5

  • 1968-1972 GM A-Body Handling Package, 1? Lowering- Stage 3.5
  • 1-1/4? front sway bar for flat cornering, CNC bent from 4140.
  • 1? diameter rear Pro-Tour sway bar offers tune-able rear roll resistance and less binding for street, corner carving or light drag and is balanced well with our 1-1/4? front bar and spring rates.
  • 1? or 2? lowering springs, linear spring rates (530 lb/in front, 130 lb/in rear).
  • Adjustable rear upper control arms with Roto-Joints.
  • Big Block Engines- An additional 1/4 front end drop may occur on vehicles with full weight big block engines.
  • Entire kit is designed and built in the USA.
  • Heavy duty 1-1/4? front sway bar with new bushings & endlinks.
  • Heavy duty frame braces with new high grade hardware.
  • Increased spindle height by 1/2? via tall upper ball joints for improved camber gain and a better tire contact patch. Works nicely in conjunction with lowering springs.
  • Key Features:
  • Lower a-arms feature UMI-built Delrin bushings, premimun ball joints and bump stops.
  • New Grade 8 proper mounting hardware.
  • Rear lower control arms featuring Roto-Joint & Polyurethane combination.
  • Rear trailing arms feature Poly and Roto-Joints as well as adjustable uppers for setting pinion angle and rear lateral location.
  • Replacement polyurethane rear end housing bushings.
  • Roto-Joints allow smooth articulation for improved handling and less bind.
  • Tubular & adjustable 1? pro-touring rear sway bar, chassis mounted design.
  • Tubular front lower a-arms with Delrin bushings.
  • Tubular upper front a-arms with Delrin bushings & ?? taller ball joints.
  • UMI rebound adjustable monotube shocks.
  • UMI shocks feature monotube construction and rebound damping adjustment. Rebound adjustment tuning improves handling and responsiveness.
  • UMI springs feature ultra premium CrSi material with linear rates front and rear for consistent handling. (530 lb/in front, 130 lb/in rear).
  • UMI?s Stage 3.5 Handling Kit Includes:
  • UMI?s Stage 3.5 kit is designed to transform your GM A-Body from a comfortable cruiser to a capable corner carver with the twist of the wrist. UMI?s lowering springs form the handling foundation and are controlled by UMI?s premium rebound adjustable shocks. Our ultra-premium springs feature carefully tuned rates and high quality construction to eliminate the floating feeling and will tie your A-body directly to the road. The UMI monotube shocks rebound adjustment allows you to fine tune your ride whether you?re doing back road heroics or shaving that last tenth of a second between the cones. UMI a-arms feature tubular construction, Delrin bushings for precise steering and caster corrected uppers. The ?? taller upper ball joints work with the lowering springs to tune up the poor factory A-body camber curve. Out back the UMI trailing arms feature Roto-Joints for smooth articulation combined with poly bushings for a smooth ride. Adjustable uppers allow for pinion angle tuning while the axle mounted pro-tour bar performs on the street, during cornering and even the occasional dragstrip blast. The entire package is designed and manufactured by UMI in Philipsburg, PA ? USA of US materials and we?re proud to drive on and race what we build.
  • Upper a-arms add caster for improved steering feel and straight line stability.

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UMI Performance

UMI Performance was founded in 2002 as a father/son business developing performance parts for GM and Ford products. They quickly began to focus on suspension upgrades for both older and late model muscle cars, and have become a leader in replacement and high-performance suspension components, from individual parts to entire kits.

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