I know they sell high quality parts and I've never heard any complaints on here. Charles @ Powertrix has always been very good to me and I've been loyal to him because he has taken care of any question or concern I've ever had. I think you would probably have a hard time noticing any performance difference between the brands. Durability and life is potentially where you may see some difference. Potentially on the adjustment mechanism itself also, but the jam nut style arms are fairly standard. Curious, is this a track car or daily driver?
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