Upper Control Arms

UMI Performance extended length upper control arms are designed to properly center the rear wheels in the vehicles wheel well on the Impala SS. These control arms are extended 5/8” but also feature additional adjustment to perfectly center the rear end. The adjustment allows the user to lengthen or shorten the control arms an additional 1/2” beyond the already extended 5/8 of an inch, all adjustments are made while the control arm stays attached to the vehicle. The control arms are built from DOM tubing and feature mounting points CNC machined from 0.250” mild steel, 4140 Chrome Moly tube adaptors and a high strength 4140 Chrome Moly heat treated 1.000” solid adjuster, truly overkill for any application! This product is supplied with high quality spherical rod ends, heat treated and hard chrome plated featuring Teflon/Kevlar self-lubricating race. Teflon lined rod end prevent metal to metal contact to reduce unwanted noise allowing for a quiet operation not found with other brand rod ends. These extended length upper control arms are designed to work with extended length lower control arms.

Additional Information

UMI’s extended upper control arms center B-Body rear wheels and add ½″ adjustability. Built from DOM tubing with 4140 Chrome Moly components and Teflon-lined rod ends, they offer quiet, precise performance and pair with extended lower arms.

• ¾” high strength chrome moly spherical Teflon lined rod end
• 4140 Chrome Moly heat treated adjuster
• CNC machined and contoured for exact tolerances and accuracy
• Durable long lasting glossy powder coat finish
• Easy on-car adjustments for additional length and setting pinion angle
• High Quality grease-able polyurethane bushings
• Shipped pre-set at 5/8” extended length

This item is available as a full kit.
Select a kit option in the following table if you are looking for this item in a bundle form with all associated components.

Kit option/s:

Thumb	SKU	Kit Title
	umi362119-B	78-96 GM B-Body Trailing Arm Kit - Black (1x umi3619-B, 1x umi3621-B)

Note for Pistons, Rings, Rotors, Rods and engine internals

Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information