UMI Performance ABR401-B Rear Upper & Lower Control Arm Kit for A-Body

The UMI Performance ABR401-B is a complete rear control arm kit designed to transform your A-Body vehicle's suspension performance. This comprehensive direct bolt-in kit includes tubular upper and lower control arms, Energy Suspension rear end housing bushings, and Grade 8 hardware with nylon lock nuts—everything needed to replace weak factory stamped steel components.

Lower Control Arms:

• Constructed from heavy-duty 1.500" x 0.120" DOM (Drawn Over Mandrel) tubing for exceptional strength
• TIG welded construction provides superior durability over stock components
• Greaseable Energy Suspension polyurethane bushings minimize deflection and maintenance
• Reinforced sway bar mounting provisions with 0.120" wall thickness steel sleeves TIG welded in place to prevent crushing
• Compatible with both stock and aftermarket sway bars

Adjustable Upper Control Arms:

• CNC machined 0.250" steel mounting plates ensure precision fit and tolerances
• 4140 chromoly threaded tube adapters and heat-treated 1.000" solid adjuster provide maximum strength
• On-car adjustability allows pinion angle tuning without removing the control arms
• Greaseable Energy Suspension fluted polyurethane bushings eliminate bind and deflection
• Fine-tune pinion angle for optimum performance, precise handling, and improved traction

Benefits:

• Minimizes wheel hop during hard acceleration
• Improves cornering capability and overall handling
• Enhances track consistency for racing applications
• Eliminates bushing deflection and flex found in factory control arms
• Durable gloss black powder coat finish for long-lasting appearance

Designed and manufactured in Pennsylvania, USA, this kit works equally well on weekend cruisers and dedicated track cars. All components are CNC machined for precision and feature MIG and TIG weld construction for superior strength over factory stamped steel arms.