UMI Performance · New
UMI Performance 64-72 GM A-Body Tubular Front Lower A-Arms Polyurethane Bushings
MPN 4031-R · Store SKU umi4031-R
Supplier stock checked 11/7/2026, 6:00:02 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
Tired of looking at hammered, crusty lower a-arms with cracked ball joint bosses? UMI has the solution with brand new modern tubular lower a-arms. UMI lower A-Arms are fabricated from DOM tubing with CNC machined tube ends for a precision fit. They are jig built to maintain accuracy and bolt on correctly every time. All critical areas are TIG welded for superior strength and a clean look. UMI's lower A-Arms also feature improved ball joint angle for lowered vehicles and the design provides additional tire clearance. Our P/N 4031 lower a-arms include greaseable polyurethane bushings, premium ball joints, polyurethane bump stops and spring isolators. UMI's extensive testing on the street, drag strip and skid pad ensures a quality product able to with stand all types of abuse. UMI lower a-arms are designed to work with factory springs, lowering springs and coil over kits without changing the a-arms. For exceptional handling and performance we recommend combining with UMI upper a-arms, P/N 4033-1. UMI Performance lower A-Arms are shipped fully assembled and ready for installation. Designed and manufactured with pride in Philipsburg, PA - USA. Hardware kit, Part # 4001- Lower a-arm hardware kit includes ½-13 Grade 8 bolts, washers and nylock nuts. Kit includes everything needed to mount your new UMI Performance a-arms to your vehicle. Simply bolt-on and go. Fits factory spindle & works with factory springs, lowering springs and coil over kits. Tubing is precision bent on a programmable tube bender and CNC machined for accuracy 4031 - 1964-1972 GM A-Body Tubular Front Lower A-Arms, Polyurethane Bushings Jig built and TIG welded for superior strength and a clean look Designed and manufactured with pride in Philipsburg, PA - USA Polyurethane bump stops & spring isolators Greaseable & fluted polyurethane bushings Durable red or black powder coat finish New premium ball joints installed Features:
Manufacturer fitment & guides
Check 4031-R against the manufacturer’s application information below.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
Part-specific notes
- California Proposition 65: Y
