The UMI 13503-2 lower control arm U-bolt kit provides replacement mounting hardware for 1963 to 1987 GM fullsize trucks. The set includes four hex-head U-bolts with nuts, finished in cadmium-plated steel for corrosion resistance. Each U-bolt measures 3.25 inches long with a 9/16-12 thread.
Specifications:
- Lower control arm U-bolt hardware kit
- Set of 4 U-bolts with nuts included
- 3.25 inch length
- 9/16-12 thread
- Hex head
- Steel, cadmium plated
- Fits 1963-1987 GM fullsize trucks
- Part number: 13503-2
FAQ
What is the 13503-2 U-bolt kit used for?
It is a lower control arm U-bolt set used on 1963 to 1987 GM fullsize trucks. The kit secures the lower A-arm hardware with four U-bolts and nuts.
What is included?
The kit is a set of four steel U-bolts with nuts included.
What are the U-bolt dimensions?
Each U-bolt is 3.25 inches long with a 9/16-12 thread and a cadmium-plated steel finish.

