[markjohnson]

Those are Ansen Ground Grabbers. There's a hole in the very rear that goes through all three bars in which allows the center bar to pivot between the other two bars that its' sandwiched between. I forget which is which: whether you add the bolt for street driving, take it out for serious drag action or vice versa. Shouldn't be too hard to figure out once you get them back on the car and study them a bit.