UMI Performance 421516-B Rear Control Arm Kit

The UMI Performance 421516-B Rear Control Arm Kit is a heavy-duty suspension upgrade engineered for street performance, drag strip use, and autocross. Designed to minimize suspension deflection, this kit delivers a crisp, responsive handling setup while significantly reducing wheel hop — a critical upgrade for high-performance and modified vehicles.

Every component is manufactured in Philipsburg, PA, USA, using CNC laser cutting and CNC machining for precise fit and consistent quality. The boxed lower control arms feature reinforced sway bar mounting holes that allow factory-style sway bar installation, and an included shim ensures the sway bar sits at the correct factory height. The upper fixed-length control arms are built with ¼" thick laser-cut mounting pads designed to work with all rear end housings.

Key Features:

• Manufactured in Philipsburg, PA – USA
• CNC laser cut ¼" upper mounting pads for precise fitment on all rear end housings
• MIG welded heavy-duty bushing holders for maximum strength
• 1/8" wall thickness USA mild steel tubing construction
• CNC machined for accuracy and consistency
• TIG welded sleeves reinforce sway bar mounting holes
• Greaseable polyurethane bushings with zinc-plated steel sleeves for long service life
• Durable powder coat finish for lasting corrosion resistance
• Installs in approximately two hours using basic hand tools

UMI Performance's rear control arm kit is a proven, bulletproof suspension solution suitable for street driving, strip performance, or corner carving. Built with greaseable polyurethane bushings and USA mild steel tubing, this kit is engineered to outlast OEM components and hold up under the most demanding conditions.