Took the S1000Rs to HM Racing to fit a PCV and have a custom map. End result:
Akrapovic Evolution Headers/Austin Racing exhaust, NO PCV: RWBHP, lb/ft
Akrapovic Evolution Headers/Austin Racing exhaust, PCV, K&N filter: RWBHP, lb/ft
Next will do a second map for the full Akrapovic system.
For dyno graphs see my FB page or Website.
Not affiliated to HM racing in any way but I highly recommend them, very professional and know their stuff.
Lots of info, pictures, etc.. on my website