Yes, this is one of my "slip on" Single Silencer kits.
This slides straight onto the stock header, and as Hanso has said comes complete with heat shield/cover and mounting bracket.
Fits both the Classic and the Roadster.
The small round disc is to fit on the L/H side at the passenger footrest to take up the space left by the L/H muffler mounting bracket (which has been removed)
With out this in place the cover will be pulled inward by about 5mm thus putting tension on that side cover which will eventually cause it to fracture.