UMI Performance · New
UMI Performance 78-96 GM B-Body Adjustable Upper Control Arms - Poly Bushings
MPN 3618-B · Store SKU umi3618-B
Supplier stock checked 11/7/2026, 7:24:37 AM UTC. Adding a part does not reserve it.
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Product details
UMI’s adjustable rear upper control arms are a reliable addition to your street car, suitable for various driving conditions. The greaseable polyurethane bushings minimize suspension deflection for improved handling, pinion angle tuning, and less wheel hop. These on car adjustable upper control arms can be easily adjusted while bolted onto the car and are suitable for multiple applications. Made with heavy duty materials, including CNC laser cut mounting pads and a mix of TIG and MIG welding, these control arms are designed for durability. They are simple to install, taking approximately 1-2 hours, and can be used on all rear end housings. Installation: The item can be installed in about 1-2 hours using basic hand tools. Adjustable rear upper control arms improve handling, reduce wheel hop, and allow easy pinion angle tuning. Featuring greaseable bushings, CNC-cut pads, and TIG/MIG welds, they’re durable, versatile, and install in 1–2 hours with basic tools UMI adjustable uppers improve handling, reduce wheel hop, and install easily.
Manufacturer fitment & guides
Check 3618-B against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
