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1978-1987 El Camino UMI Stage 4 Handling Package, 1 Inch Rear Drop, 450lb Front Springs, Red GBF004-1-R

Ground Up Part #: UMI-GBF004-1-R

Manufacturer Part #: GBF004-1-R

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(fits 6 models)
No Vehicle Selected
(fits 6 models)
$4,699.99 (Kit)
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Part Details Vehicle Fitment Reviews
Who says you can't have it all? UMI's Stage 4 kit transforms your El Camino into a handling machine with the adjustability to perform well at the strip or haul your family comfortably - to the autocross. If drag racing is more your style, a few minor changes at initial purchase (or down the road) will have you launching with the best of them, then canyon carving on the way home! Up front we start with UMI's proven upper and lower tubular a-arms loaded with 1/2 inch taller upper and lower ball joints giving you a total of 1 inch increased spindle height. The adjustable upper a-arms increase caster, without additional shims, for a precise steering feel. The lower a-arms are loaded with UMI-built Delrin bushings for smooth non-binding motion and precise steering. Viking's new front hybrid coilover with double adjustable shock allows ride height, compression and rebound adjustment. The ride height adjustment is accomplished with the included spanner wrenches and thrust washers. The compression and rebound adjusters are clicked by hand (no tools!) and feature a total of 361 possible valving combinations. The front is completed by UMI's 1.250 inch chromoly handling sway bar. Out back we stiffen the chassis with adjustable tubular frame braces which stabilize the Poly/Roto combo lower trailing arms and fully adjustable Roto-Joint upper control arms. 1 inch or 2 inch lowering rear springs are controlled by Viking's double adjustable rear shocks, once again featuring 361 possible combinations. Rounding out the rear is our Pro-Tour style rear sway bar. This 3-way adjustable bar features 1 inch tubular construction, race style end links and UMI's proven CNC machined clamping system. One bar allows street, road race, auto-x and drag settings. As always, this kit features UMI's quality red or black powder coat and premium hardware. All UMI components are manufactured with pride in Philipsburg, PA USA.
  • Increased spindle height by 1/2 inch via tall upper ball joints for improved camber gain and a better contact patch. Works nicely in conjunction with lowering springs
  • Upper a-arms add caster for improved steering feel and straight line stability. Adjustability means minimum shims
  • Lower a-arms feature UMI-built Delrin bushings and accept standard springs or coilovers
  • 1.250 inch front sway bar for flat cornering, CNC bent from 4140
  • Double adjustable Viking shocks are hand assembled in Minnesota, USA and feature 361 possible valving combinations. Simply click and tune
  • Hybrid coilover springs are available in various rates depending on application and are made in USA
  • Rear trailing arms feature Poly and Roto-Joints as well as adjustable uppers for setting pinion angle and rear lateral location
  • Roto-Joints allow smooth articulation for improved handling and less bind
  • Choice of 1 inch or 2 inch rear lowering springs combined with Viking double adjustable rear shocks works great on street, auto-x and even the drag strip
  • 1 inch diameter tubular Pro-Tour style rear sway bar allows settings for street/handling or strip. Chassis mounted sway bar allows 3 adjustments
  • Rear sway bar is preload adjustable to function as a drag anti-roll bar. Simply turn the on-car adjuster and leave the line with no body twist and even traction
  • Premium hardware included. Bolt on and go
  • Manufactured in Philipsburg, PA - USA by workers who care about your car

UMI Stage 4 Handling Kit Includes:
  • Tubular lower front a-arms with Delrin bushings & 1/2 inch taller ball joints. UMI-3032-1
  • Tubular adjustable upper front a-arms with 1/2 taller ball joints, UMI-3056-2
  • 1-1/4 inch front sway bar with bushings and end links, UMI-3035
  • 1 inch tubular pro-touring rear sway bar, 3-way adjustable, UMI-3044
  • Set of (4) double adjustable Viking shocks, front shocks coilover
  • Front coilover springs with choice of spring rate
  • Thrust bearing and spanner wrench for quick and easy height adjustments
  • Rear lowering springs, choice of 1 inch or 2 inch drop
  • Tubular rear lower control arms with Roto-Joint, UMI 3038
  • Adjustable rear upper control arms with Roto-Joints, UMI-3037
  • Tubular frame braces, UMI-3028
  • Replacement rear end housing bushings, UMI-3000
  • All new grade 10.9 hardware with nylock nuts to install kit

Manufacturer Part Number : GBF004-1-R

warning WARNING: Cancer & Reproductive Harm -
Brand Logo UMI Performance
Additional Information
  • Ground Up Part #: UMI-GBF004-1-R
  • Brand: UMI Performance
  • Manufacturer Part #: GBF004-1-R
  • Sold As: Kit
  • Shipping Details: This item ships in multiple oversize boxes.
Vehicle Fitment
Make Model Year Body Style
Chevrolet El Camino 1978 -
Chevrolet El Camino 1979 -
Chevrolet El Camino 1980 -
Chevrolet El Camino 1981 -
Chevrolet El Camino 1982 -
Chevrolet El Camino 1983 -
Chevrolet El Camino 1984 -
Chevrolet El Camino 1985 -
Chevrolet El Camino 1986 -
Chevrolet El Camino 1987 -
Installation Time
Installation Time: Info Unavailable
Installation Difficulty
Installation Difficulty: Info Unavailable

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