Since Ford didn't make any Boss mustangs there were a number of 3rd parties that made their own versions of the Boss Mustang. So basically, all the Boss's between 2005 and 2010 were more aftermarket tribute cars than anything else, Ford didn't make any Boss's until the new 5.0 came out since the S197's were released. This particular version had many different stages, the cheaper stages included appearance upgrades (interior and exterior), while the more expensive stages including power and suspension upgrades. I'm not showing that the one linked in the OP's post had any upgrades other than appearance and interior changes, other than a upgraded shifter.
For more info on the Team Shinoda version of the Boss Mustang.....
I just wanted to bring this up since nobody is actually claiming it's a Ford generated Boss Mustang