Depends where you live, some places will allow the HP update file to be added, other places/countries no.. But its pointless, just get a conservative tune if your worried and drive with 630hp
BMW knows people tune the engines, they allow a certain amount of tolerance. With our cars, the transmission clutches will slip first before we reach engine conditions that are unsafe.. so with just a flash tune, you will make safe power and be well above the small amount the competition pkg ads.. I run ESS Flash on my M6 and its perfectly dialed in, safe and I dont have to mess with JB4, or map switching or testing.. thats if you prefer the easy safe route.. and switching back to stock is takes just a couple min with their cable.