It's a GSA 08. They fit but LHS is tight. I trap a piece of 3mm rubber sheet between crash bar and head protector.
The crash bars are frankly worse than useless. A low speed drop easily bends the bar backward. Fine - it absorbs shock. Not fine - they hit the cylinder fins and concentrate damage. LH has no space to move so especially bad. They don't protect the valve covers shown by scars on the TT head protectors.
My plan is to cut off the engine crash bars and fit a shorter connecting tube to the engine so they support the fuel tank bars with no stocked out sideways.
The TT head protectors are tough and bend on impact but the cylinder head lugs look weak. I'm replacing with carbon skin protectors. They won't do much in a fast fall & slide but they can't increase stress loads and a crash like that will be an insurance job anyway.