Cross bars are 1" EMT Conduit with the ends pinched in a vise. I did not use the bolts from the cross bars. I used stainless steel carriage bolts. The square under the head of the bolt was an exact fit in the slot of the factory rails. Used four on each side as well as some nylon spacers. I did not run the EMT all the way to the end because I have canoe bars I can take on and off as needed.
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hahahaha you're my new best friend. I know it's a year later but this is rad. I donno how I didn't see it through almost 1000 posts on the 4runner forum. This is happening to the gx REAL soon. Thanks for sharing.