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UMI 4020-R 64-72 A-Body Rear Lift Bar Set-Up Weld-In, Red
UMI 4020-R 64-72 A-Body Rear Lift Bar Set-Up Weld-In, Red

UMI 4020-R 64-72 A-Body Rear Lift Bar Set-Up Weld-In, Red

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UMI 4020-R 64-72 A-Body Rear Lift Bar Set-Up Weld-In, Red
UMI 4020-R 64-72 A-Body Rear Lift Bar Set-Up Weld-In, Red
UMI 4020-R 64-72 A-Body Rear Lift Bar Set-Up Weld-In, Red
UMI 4020-R 64-72 A-Body Rear Lift Bar Set-Up Weld-In, Red
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We estimate this item will ship on or before October 6th.
Part # 1854020R
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Sold in Quantity:
MFG. Part #:
Mounting Hardware Included:
Traction Bar Finish:
Red Powdercoated
Traction Bar Material:


The UMI rear lift bars replace the factory rear control arms adding traction while not changing vehicle ride height. Lift bars work with axle torque to load the chassis of the car, forcing the rear wheels downward pushing the tires into the ground resulting in harder launches and improved 60-foot times. The UMI lift bars are designed to improve traction and reduce unwanted wheel hop. Lift bars are constructed of boxed mild steel tubing, 1/8" thick wall and 3/16" thick mounting brackets. Lift bars feature greaseable polyurethane bushings which are designed to reduce bushing deflection while being streetable. Lift bar kit features the correct provisions for adding a stock or aftermarket sway bar, the sway bar holes are placed in the correct pattern to maintain the sway bar level with the rear end while the lift bar is in the lowest hole. Sway bar holes are reinforced with a 1/8" wall thickness steel sleeve TIG welded into place. The rear mounting brackets feature three settings that allow the lift bar to be lowered 2", 2-3/4” or 3-1/4”. Lift bar set up is designed to correct lost geometry and correct instant center on a lowered vehicle. Add a set of UMI adjustable upper control arms for the maximal rear suspension set-up and performance.

Installation: P/N 4020 is weld-in only, mounting brackets supplied bare metal for easy welding. Hardware and detailed installation instructions are included. For a bolt in set up see P/N 4022.


  • Boxed control arms CNC machined from 1/8” wall USA tubing.

  • MIG welding bushing holders with greaseable polyurethane bushings.

  • CNC laser cut mounting brackets.

  • Adjustable control arm angle using 3-hole mounting design.

  • Reinforced sway bar holes place sway bar close to rear end.

  • Grade 8 mounting hardware.

  • Durable powder coat finish.


Installation Instructions (PDF)

Important Messages:

  • This item ships directly from the manufacturer. It may take an additional 10 business days for UMI Performance to ship this item.
  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
  • This item ships via Ground Shipping only. Expedited and Air shipping options are not available.
Some parts are not legal for use in California or other states with similar laws/regulations

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Q & A

Videos & Articles
  • Speedway Motors employee Jess M. talks about customizing the rear radius rods she installed on her '33 5-Window coupe.
  • Learn how replace lower and upper rear control arms. Read up on racer Steve's A-body control arm replacement and the bushings included kit he recommends.
  • Learn about AFCO shocks and the importance of shock performance while racing. See tips on how to adjust shocks to accommodate track conditions.

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