Hey Phil, their made to correct a couple of weak spots really. Apparently they can come apart from the spot welds between the bottom of the A pillar and the front guard where they join. The long ones are to help with where they crack from the weight of the batteries, especially the aux side. Yeah my panel beater mate said GQs are weak as piss in that area. I think a combination of corrugations, hard hits and maybe older bodies & corrosion takes its toll. The guy that developed them is in SA (Pinaroo) and does a fair bit of outback touring so i guess corrugations would be a big one, they certainly seem to destroy a lot of things. . .
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