07/21/2026
Tech Tip Tuesday: SPC Upper Control Arms
Love them? Hate them?
Years ago, SPC upper control arms were one of the most common UCAs on the market. They became a go-to option for countless lifted trucks. Over the years, they had a few issues that gave them a mixed reputation. The latest version addresses many of those concerns and is a much better design.
Today’s tip isn’t about whether you should buy them—it’s about avoiding one of the most common installation mistakes we’ve seen.
The mistake?
Installing them upside down… or swapping the left and right arms how ever you put it we seen them come in wrong .
It sounds simple, but we’ve seen it happen more times than we’d like to admit. Experienced shops have done it. We’ve even caught ourselves double-checking before installation. That’s exactly why we’re making this video.
Taking a few extra minutes to verify orientation before tightening everything down can save you from alignment headaches and unnecessary frustration later.
Part 2: We’ll go over the common issues the older SPC arms had, what SPC changed, and the upgrades that make the current version a better option.
Have you run SPC UCAs on your truck? Love them or hate them? Let us know your experience in the comments. 👇