It's a hollow square bar like you've fitted, but about twice the size.
aye mate but whats it made of? mines High tensile steel box section, every 5 meters has a 5 tone breaking point at its center (it's designed for lifting gear for the oil industry) lol so i know its pretty strong... is the bar for the hoops welded as well i thought it was bolted?
good thought tho an off the shelf bar like for the hoops would be better for this mod than more welding
adam
Can't help on the type of steel, sorry. Mike Satur is the guy to ask. It is bolted into place around the position of the seat belt reels. In fact the reels bolt through it.