While I have no experience with them, keep in mind any control arm with Uniballs or heim joints will have a reduced life in environments with any kind of harsh winter environment as compared to a standard sealed ball joint or bushing. That's why I went with the SPC Uppers.
I live in Oklahoma and run heim UCA’s right now. I️ prefer the design and haven’t noticed hardly any wear. If I were to go SPC it would only be to save money i think.
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