Just bought a Competition Engineering roll bar from summit last friday......looks pretty much like that one...all the bars are 1 3/4...
some kits come with shorter bars going to the rear of the car...the Jegster Kit I bought a few years ago was like that...plus came with 1 1/2 inch bars for tying into frame connectors...and hoop cross brace was 1 1/2 inch diameter also....but that is legal...
Was going to buy a kit from Chasissworks...I was in Sacramento last week...but they did not have one in stock and said it would take them 3-5 days put one together...