UMI Performance Boxed Lower Control Arms with Roto-Joints

UMI Performance Boxed Lower Control Arms with Roto-Joints are a rear suspension upgrade. They replace factory stamped lower control arms and give bind-free performance with a comfortable, quiet ride. Roto-Joint technology and boxed rectangular-tube construction improve traction, reduce wheel hop and sharpen handling for street and track use.

Key Features:

• Boxed construction: The arms are fabricated from 0.120" wall thickness rectangular steel tubing for strength and rigidity.
• Precision machining: CNC machined drawn-over-mandrel bushing holders keep tolerances accurate. MIG welded end caps keep road debris out.
• Roto-Joint technology: A 4140 chrome moly spherical ball rotates in a delrin race. It allows about 28 degrees of unrestricted movement for free articulation.
• Less flex and deflection: The solid arms and delrin-lined Roto-Joints reduce arm flex and bushing deflection. This improves traction and helps control wheel hop.
• Serviceable joints: The Roto-Joints are greaseable, adjustable and rebuildable, so they keep performing over the long term.
• Sway bar ready: Reinforced sway bar provisions are included for use with stock or aftermarket rear sway bars.
• Durable finish: A powder coat finish protects against corrosion.
• Ready to install: The arms ship fully assembled.

Roto-Joints are available on both ends of the arm, or paired with polyurethane bushings on the chassis end. The dual Roto-Joint design gives maximum articulation and a firm, precise feel. The poly/Roto-Joint design uses the softer polyurethane bushing to absorb more road noise and shock before it reaches the cabin. Both are an alternative to factory rubber bushings and a good fit for performance street driving, drag racing and track days.