The higher HPs can be attained with some of the better EFI Live tunes but at some point you will have to start thinking about making the transmission stronger, as well as engine internals. The LLY motors tend to have head gasket failures when pushed to higher HP limits. Do you have strict emissions controls in Norway? There are still many places in the US that don't test for that, so we can remove catalytic converters and EGR systems to increase power. There are a number of excellent tuners on this forum that can assist you and programming can be accomplished via email.