Lite`n up a little......Seat of the pants......
Sorry, got on a rant......I hate yo see people be "taken"Lite`n up a little.
For many of us, for many reasons, a dyno is not an option.
In the early days seat of the pants is all they had.
Does a low restriction intake add massive HP? No. Can you get gains? Yes.
With that particular one... :dunno
We know it is the proper blending of parts, proper assembly, correct tuning that give you the gains.
All the while keeping the final intended use of the bike in mind.
Among other factors.
And no one other then you mentioned a hyper charger.
Yes. Those are junk. If you had taken some time to familiarize yourself with other info, posts already on this site you would have found anyone asking about it in particular are quickly told they are pretty much junk and 100% snake oil as far as any performance gains.