UMI’s adjustable upper a-arms are designed to excel in Pro-Touring, road race, auto-x and hot street corner carving. The race quality rod ends provide shim-free camber and caster adjustment along with ultimate smooth travel. This arm features a relocated ball joint pad to increase caster and improve stability and steering feel as well as a shortened cross shaft to ball joint distance. We recommend the 4056 arm for all racing applications. Arm must be used with tall spindles when using standard height ball joints. 100% manufactured, tested and raced out of Philipsburg, PA – USA.
Note: Upper a-arm P/N 4056-1 includes standard height ball joints and must be used with A-Body tall spindles. In most cases shims are not needed. Shims may still be required on some applications.
Hardware kit, Part # 4003 - Upper a-arm hardware kit includes Grade 8 bolts, washers and nylock nuts. Kit includes everything needed to mount your new UMI Performance A-Arms to your vehicle
Relocated ball joint pad for increased caster and improved steering feel without excess shims.
May also work in conjunction with other lower a-arms and/or spindles (contact UMI to discuss).
Package includes recommended alignment specs and detailed installation instructions.
Direct bolt-in compatible with factory or UMI lower a-arm and tall spindles.
Designed, tested, manufactured and raced in Philipsburg, PA-USA.
UMI Performance 64-72 GM A-Body Front Upper A-arms Adjustable
4056-1 - 1964-1972 GM A-Body Front Upper A-arms, Adjustable
0.120” wall thickness 1.250” diameter DOM tubing.
4130 CrMo cross shafts, CNC machined & zinc plated.
TIG welded for superior strength and clean looks.
UMI- A-Arms, Upper, Adj, Std Ball Joint
Laser cut ball joint mounting pad.
Polyurethane bump stops included.
Travel limiting bolt compatible.
Features and benefits:
Front Control Arms
