Steel...super heavy. I have hit and scraped them on many rocks...if i had to do it again i would have got aluminum for the weight. Then again not sure if aluminum will bend as my ttue 1/4 inch aluminum skid plate has dents in it and my steel skids have none.
Same reasons I will probably go for Steel skids, plus the extra weight will lower the center of gravity, making the FJ even more stable.
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