Upper Control Arm

UMI Performance offers an on-car adjustable control arm for the rear of the GM B-Body vehicle. This rear upper control arm for the 65-66 GM B-Body is a direct replacement for the factory arms and is designed to minimize wheel hop, improve corning, and help track consistency. It allows for easy pinion angle adjustments without the need to remove it from the vehicle. The control arm features greaseable bushings, TIG welded construction, and a 4140 heat treated Chrome-Moly adjuster. Please verify whether your vehicle has (1) or (2) upper control arms. Six cylinder and most small block vehicles were supplied with a 3-link rear suspension while big block vehicles used a 4-link set-up.

Additional Information

UMI’s 3662 rear upper control arm is a direct replacement that reduces wheel hop, improves cornering, and boosts track consistency. Easy on-car pinion angle adjustments with greaseable bushings, TIG welds, and a 4140 Chrome-Moly adjuster.

• 4140 Chrome-Moly Tube Adaptors
• Brilliant Durable Powder Coat
• Grease-able High Quality Polyurethane Bushings
• On-Car Adjustability using a 4140 Heat Treated Adjuster
• TIG Welded Construction

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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