UMI Performance 4056-2-B Adjustable Upper Front Control A-Arm Powder Coat - Black

The UMI Performance 4056-2-B is a high-performance adjustable upper front A-arm engineered for A-body Pro Touring and drag racing applications. Hand-built in Philipsburg, PA using US materials, this arm delivers measurable improvements in camber curve, caster, and front-end grip over factory upper control arms.

The precision-designed ball joint mounting pad relocates the ball joint rearward, increasing caster and improving steering feel without the need for excess shims. A premium ½" taller upper ball joint is installed at the factory, raising spindle height by ½" for an optimized camber curve and increased front-end traction. The arm is direct bolt-in compatible with factory lower A-arms and factory spindles, and may also be used in conjunction with UMI lower A-arms or compatible aftermarket spindles.

Key Features:

• Constructed from 0.120" wall, 1.250" diameter USA DOM tubing for exceptional rigidity
• 4130 CrMo cross shafts, CNC machined and zinc plated for corrosion resistance
• Two precision rod ends on machined CrMo cross shaft for easy arm adjustment
• TIG welded construction for superior strength and clean aesthetics
• Laser cut ball joint mounting pad with premium ½" taller ball joint installed
• Laser cut bump stop brace included
• Travel limiting bolt compatible for drag racing applications
• Polyurethane bump stops included
• Finished in black powder coat
• Designed, tested, manufactured, and raced in Philipsburg, PA — USA

What's Included:

• Upper A-arm assembly with ball joint installed
• Recommended alignment specifications
• Detailed installation instructions
• Hardware Kit Part #4003: 7/16" Grade 8 bolts, washers, and nylock nuts — everything needed to mount the A-arms to your vehicle

Important Notes:

• The 4056-2 upper A-arm is designed for lowered vehicles. It is not recommended for use with cargo coils or above-stock ride height, as the bump stop may contact the cross brace.
• Designed to work with factory height spindles. UMI is not responsible for fitment issues arising from use of incompatible components.
• May work in conjunction with other lower A-arms and/or spindles — contact UMI Performance to discuss compatibility.