Hello, I'm Chris.I will do my best to answer your question fast and accurate using the info you have provided. Thanks for visiting Just Answer.
I know this is far from what your wanting to hear but I will go ahead and tell you since no one else appears to want to engage this post, since its likely not what your looking for.
However there are a few things you can do to gain some more HP. Remove the mechanical fan and mount an electric one which will free up about 5 HP. Go with a larger diameter free flowing exhaust from the turbo out which will get another 2-3 HP. Add a propane injector into the intake system which will gain about 15-20 HP. Be aware that most of these changes will void all of the warranty on your tractor. The only thing warrantable will be the cab and electronics and paint all of the powertrain and drivetrain will be void, they will say it was caused by the increased power over there set specs.