UMI Performance · New
UMI Performance 73-77 GM A-Body Upper & Lower Control Arm Kit
MPN 421516-B · Store SKU umi421516-B
Supplier stock checked 11/7/2026, 10:14:21 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
UMI’s rear control arm kit is a bulletproof addition to your car. Suitable for street, strip or corner carving, this kit minimizes suspension deflection for a crisp handling setup and less wheel hop. The boxed lower control arms feature reinforced sway bar mounting holes to allow factory style sway bar mounting while the included shim allows sway bar to sit at factory height. The upper fixed length control arms feature a heavy duty ¼” thick laser cut mounting pads designed to work on all rear end housings. UMI’s control arms are CNC machined for accuracy and assembled with high quality greaseable polyurethane bushings. Installation: Item installs in approximately two hours using basic hand tools. Greaseable polyurethane bushings with zinc plated steel sleeves 421516 - 1973-1977 GM A-Body Upper & Lower Control Arm Kit TIG welded sleeves reinforce sway bar mounting holes Durable and long lasting powder coat finish 1/8” wall thickness USA mild steel tubing CNC machined for accuracy and consistency CNC laser cut ¼” upper mounting pads MIG welded heavy duty bushing holders Made in Philipsburg, PA – USA Features
Manufacturer fitment & guides
Check 421516-B against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
