I was considering doing the stage IV kit on my 103 FLHTK (2014 model) until I found out HD has just released a bolt on 110 kit!!
Part # 92500032
Yippee!!
No case boring required with this kit which is a plus.
I am getting a quote from the stealer on fitting costs now as I'm very interested!
With this kit I'll have the same capacity as a CVO model! - Cool!

Sound very interesting

If they don't make enough power with 103 cubes what if any difference do you honestly think 7 will make .

That's certainly something i'm interested in.. The 103HO needs more, more more. Actually it might be me.

I think the problem is though chriso anyone doing the upgrade will throw in cams and a tune wich would make a more noticable difference then the cubes anyway after all the japs have made more horsepower with lot less cubes.
And I think the best substitute for cubes is a turbo.

yep or supercharger lol