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UMI Performance 4038-R Rear Lower Control Arms with Roto-Joint Technology

(Chevrolet Malibu 1964-67, Chevelle 1964-72, El Camino 1964-72; Pontiac GTO 1964-72, Grand Prix 1969-72, LeMans 1964-72, Tempest 1964-70 + 6 more models)

Manufacturer

Picture for manufacturer UMI Performance

Part Number

4038-R
4 reviews
Sale Price

$306.61

4 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

UMI Performance's 4038-R rear lower control arms combine advanced Roto-Joint technology with precision engineering to deliver exceptional handling performance while maintaining daily driver comfort. These tubular control arms are designed for street performance enthusiasts who demand both track-capable performance and streetable ride quality.

Roto-Joint Technology:

The innovative Roto-Joint design features a spherical pivot ball lined with a greaseable Delrin race, providing 28 degrees of total unrestricted movement for bind-free operation. This technology allows the suspension to articulate correctly, eliminating the bind and deflection associated with factory rubber bushings while absorbing shock and road noise for quiet, smooth operation. The low-friction design improves traction and precision handling by allowing proper rear axle movement during cornering and hard acceleration.

Hybrid Bushing Configuration:

These control arms feature a street-optimized setup with Energy Suspension greaseable polyurethane bushings on the chassis end and UMI's spherical Roto-Joint on the axle end. The softer polyurethane chassis bushings absorb additional road noise and vibration before it enters the passenger compartment, while the Roto-Joint at the axle end provides the precision articulation needed for performance driving.

Construction and Features:

  • Constructed from 1.500" x 0.120" DOM (drawn over mandrel) mild steel tubing for exceptional strength
  • Fully TIG welded construction for maximum durability
  • Reinforced sway bar mounting holes with 0.120" wall thickness steel sleeves, TIG welded and smoothed
  • Compatible with OEM hardware for direct installation
  • Durable powder coat finish for corrosion resistance and long-lasting appearance
  • Greaseable bushings and Roto-Joints for easy maintenance
  • Shipped fully assembled and ready to install

Ideal for autocross, road racing, spirited street driving, and performance cruisers, these control arms deliver competition-level suspension articulation without sacrificing street manners or ride comfort.

Products specifications

Fits

Chevrolet Malibu 1964-67, Chevelle 1964-72, El Camino 1964-72; Pontiac GTO 1964-72, Grand Prix 1969-72, LeMans 1964-72, Tempest 1964-70; Oldsmobile Cutlass 1964-72, 442 1964-71, Vista Cruiser 1964-72; Buick Skylark 1964-72 + 3 more models

Ball Joint Included

No

Bushing Material

Spherical bearing/Delrin

Bushings Included

Yes

Control Arm Finish

Red powdercoated

Control Arm Style

Tubular

Notes

One end has a polyurethane bushing, the other end has a Roto-Joint.

Quantity

Sold as a pair.

Autoplicity simply had the best prices available and everything was in stock to be shipped.

Awesome deal

Autoplicity leads the way ! Others take a lesson !! Great prices and excellent service !!!

No problems ordering a leak down tester from Autoplicity which had the lowest price and reasonable shipping charges. The item was well packaged and I would buy from them again.

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