UMI Front A-Arm Kit, Road Race, Boxed Lower + Adj Upper



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SKU: 230910 Categories: , , Tag:

UMI’s heavy duty boxed arm kit with adjustable rod ends provides a rock-solid foundation for your autocross, road race or corner carving 4th Gen. The lower a-arms fully gusseted box tubing construction, while appearing heavy-duty, affords a five pound weight savings per set over factory lower a-arms. These arms have double shear sway bar mount tabs with endlink set included as well as factory GM pedestal location. Lower arms are compatible with factory, Koni, and other t-bar, stock mount shocks. Upper arms feature caster and camber adjustment with premium rod ends. Laser cut ball joint pads feature improved ball joint angle and increased caster (up to additional 2 degrees – varies by chassis) for lowered cars and come assembled with premium ball joints. UMI’s newest design features the most travel and clearance of any a-arm on the market and is a must for lowered vehicles. This A-arm kit is designed to work with the factory K-member, UMI k-members, and virtually all stock mounting point aftermarket K-members. Crafted with pride in Philipsburg, PA- USA.


Hardware kit P/N 2303 – A-arm hardware kit includes Grade 10.9 bolts, washers and Ny-lock nuts. Kit includes everything needed to mount your new UMI a-arms to the vehicle.



  • 0.120” wall mild steel box tubing lower
  • 5 lb weight savings per kit
  • Double shear sway bar mount with endlink set included
  • Pedestal mount fits DeCarbon, Koni, Bilstein and aftermarket GM t-bar
  • Double gusset design for flex-free operation
  • Race quality high misalignment rod end on vertical mount
  • Nominal 2 degrees additional caster built-in
  • Teflon lined, high load capacity race rod ends= less suspension friction.
  • Adjustment allows additional caster and camber to be achieved.
  • Uses balance of OEM hardware or use new UMI hardware kit.
  • Premium ball joints installed
  • Durable red or black powder coat.
  • Made in Philipsburg, PA – USA

Red, Black


Manual, 4l60e, Th350, Th400, 4l80e


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