UMI Performance · New
UMI Performance 73-77 GM A-Body Boxed Rear Lower Control Arms
MPN 4215-B · Store SKU umi4215-B
Supplier stock checked 11/7/2026, 4:21:25 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.
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Product details
UMI’s boxed rear lower control arms are a bulletproof addition to your car. Suitable for street, strip or corner carving, these arms minimize suspension deflection for a crisp handling setup and less wheel hop. Sway bar mounting holes are reinforced with TIG welded sleeves to allow factory style sway bar mounting while the included shim allows the sway bar to sit at factory height. UMI’s boxed control arms are CNC machined for accuracy and assembled with high quality greaseable polyurethane bushings. Installation: Item installs in approximately one hour using basic hand tools. Greaseable polyurethane bushings with zinc plated sleeves 4215 - 1973-1977 GM A-Body Boxed Rear Lower Control Arms TIG welded sleeves reinforce sway bar mounting holes 1/8” wall thickness mild steel rectangular tubing Durable and long lasting powder coat finish CNC machined for accuracy and consistency MIG welded heavy duty bushing holders Made in Philipsburg, PA – USA Features
Manufacturer fitment & guides
Check 4215-B against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
