This is the shell for a Holden Commodore built for the Australian Touring Car Championship - the ones with the V8's! The photo clearly shows the tubes running from the top corners of the windshield down to the base of the forward hoop (near the driver's feet). Also check out the mini-diagonals which close out the upper corners of the windshield opening. They don't quite form the diamond shape that we saw earlier on the Trans Am Mustang but the idea is the same to a lesser degree. There are two rear X-Bars. One across the rear window and another horizontal one like we just saw on the Audi A4. There is a horizontal bar extending across the car between the main hoop legs behind the driver's shoulders. And there are two mini-diagonals which help triangulate this area. They extend up from the base of the main hoop to the center of the "harness bar" as we like to call it in the US. Note how the front strut towers are triangulated.