Sandro, I am just now installing the case sliders today and got the primary side done. On the exhaust side, I had previously installed the ASB kit that removes the rivets and uses screws to hold the cover plate on. These screws are larger than those that you provide for the slider. There are another set of holes in the back plate behind the timing cover which I loosely threaded your bolts on but they don't seem like a very tight fit. I'm wondering if you or anyone else knows if the two sets of holes were originally the same size?
Worst case I'll drill two new holes in the back plate...

Worst case I'll drill two new holes in the back plate...