Upper A-Arm

Improve the street and track performance of your GM truck and achieve that precise Pro-Touring feel by combining our popular P/N 3033 upper a-arms with ½” taller premium ball joints. P/N 3033-2 a-arms combine the benefit of additional caster with increased negative camber potential throughout the suspension travel. The relocated ball joint plate offers up to six degrees caster without excessive shimming while the ½” taller ball joint creates up to one additional degree negative camber at full bump travel. Expect improved steering feel courtesy of increased caster and an overall increase in lateral grip due to the camber improvement. Features include greaseable, low deflection UMI designed and manufactured Delrin bushings, CrMo cross shafts, improved header clearance and polyurethane bump stops. These track-tested, jig built DOM a-arms are supplied with a durable gloss red or black powder coat finish which guarantees your performance parts stay beautiful on your street truck, drag truck, autocrosser or Pro-touring machine. Designed and manufactured with pride in Philipsburg, PA - USA.

Additional Information

UMI 3033-2 a-arms boost handling with added caster and camber for better grip and steering feel. Features include tall ball joints, Delrin bushings, CrMo shafts, and durable powder coat—perfect for street, autocross, or Pro-Touring builds.

• 4140 CrMo cross shafts, CNC machined & zinc plated
• CNC machined ball joint mount & tubing radiuses
• Direct bolt-in compatible with factory or UMI lower a-arm & factory spindle
• May also work in conjunction with other brand lower A-arms and/or spindles
• New premium ½” taller ball joints for improved camber curve
• Package includes recommended alignment specs & detailed installation instructions
• Polyurethane bump stops included
• Precision bent tubing on programmable tube bender
• Relocated ball joint pad for increased caster without excess shims
• Robust tubular design with machined gussets
• TIG welded for superior strength & clean looks
• UMI built, greaseable & fluted CNC machined no deflection Delrin bushings

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
	umiGBF025-B	UMI Performance 78-88 GM G-Body Handling Package- Stage 2 with Coilover - Black (1x umiA204-450R, 1x umi3015-B, 1x umi3031-B, 1x umi3016-B, 1x umi3033-1-B, 1x umi7917-101, 1x umi3000-B, 1x umi3028-B, 1x umi3001, 1x umi3013, 1x umi3049, 1x umi3034-B, 1x umi3035-B, 2x umi12DP125, 2x umiC209-T, 1x umi90095, 1x umi90035-B)

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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