iron would need to get some sort of rust prevention in order to not get corroded, like a rust preventive paint, or a powdercoating if you re fancy, but that will raise the cost to the level of the aluminium one. So , since the aluminium one is lighter, everything points to that.
no there's no fear of anything bending. i have had brembos with aluminum brackets on all my 3 cars, currently on the SX and both previous ones.
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