So I heard from Harrop, the boxes are not even sold with the intake anymore. Better performance without and most people did some thing unique. Below is a dyno graph comparing Harrop with- box / stacks / vs / FAST
Mike helps a lot, thanks. I'll get back to you with details. More HP of course!
70rs not a bad thought but not really workable with current set up.
So looks like I'm shopping for some sort of stacks?