UMI Performance 3657-B Upper Control Arm for GM B-Body - 1965-66

The UMI Performance 3657-B is a high-performance upper control arm designed specifically for 1965-66 GM B-Body vehicles. This control arm offers on-car adjustability, allowing you to make pinion angle adjustments without removing the arm from the vehicle—a significant advantage over competitor designs that require complete removal for adjustments.

Key Features:

• On-car adjustable design using a 4140 heat-treated Chrome-Moly adjuster with left and right-hand threads
• TIG welded construction for superior strength and durability
• 4140 Chrome-Moly tube adaptors for enhanced performance
• Greaseable Energy Suspension polyurethane bushings for reduced friction and long service life
• Durable powder coat finish for corrosion resistance
• Direct replacement for worn factory control arms

Performance Benefits:

• Minimizes wheel hop during hard acceleration
• Improves cornering stability and handling
• Enhances track consistency for drag racing applications
• Eliminates the need for shims during installation through precise adjustability

Adjustments are simple: loosen two jam nuts and turn the heat-treated adjuster to achieve your desired pinion angle. This control arm is an excellent upgrade for street performance, drag racing, or restoration projects where improved handling and adjustability are priorities.

Important: This item is sold individually. Please verify whether your vehicle requires one or two upper control arms. Six-cylinder and most small block vehicles came equipped with a 3-link rear suspension, while big block vehicles used a 4-link setup.