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Articulation is only half of what motivates Pro Comp's engineers. These boxed lower front control arms are fabricated from steel plate just like the ones you'd find under trophy trucks. Each arm is massive compared to the tubular style arms found under other kits and each features exterior fish-plate gusseting for durability and appearance. Constructed from 3/16-inch steel sheet, this design adds significant strength, allowing the suspension to cycle rapidly without coming apart. These will also survive a forceful blow without deflecting or bending.