It will be pretty expensive and depending on whether or not you do the installation of the bottom end upgrades, it will make a big difference. For the parts alone, expect to pay more than $3000 which would include the pistons, rings, connecting rods, fuel injectors, fuel pressure regulator, fuel pump, Hondata, etc. The tuning, chipping of the ECU, installation of parts, etc will run you another $1500 or more. I don't know much about N/A and the price of labor for the installation and tuning, but it isn't cheap.

For the price of all that, I would much rather piece together my own turbo kit and run Hondata and be putting down over 100 hp more to the wheels. But that is just me, and if you plan on going N/A be prepared to spend a lot of money.

Also, how many miles does the engine have? It might be a good idea to do a full rebuild before you plan on doing all this. It is better to be safe than sorry especially considering the amount of money involved.