What the individual parts do is easy however making big numbers out of a Honda start at the bottom rather than the top of the engine. The two biggest power adders you can add are a Turbo and NOS which give you almost unlimited power. The problem is do you want to just start the 1/4 mile fast then blow an engine at the 1/16 mile or run strong to the 1/4 mile.

Let me say an engine is just not parts that can be replaced individually for more power. Every part in your engine works with every other part and replacing or upgrading one is going to have a positive effect on one part and a negative on another.

Any engine from the manufacturer is not rated for a turbo and if you try to put a 20psi boost on a stock engine you end up with scrap metal very quickly. On the other hand if you build the engine internals (such as pistons) to handle more power you can do so safely and reliably. It costs more, if you wanna do thing the right way it usually does.

If you want quick bolt on relatively safe power consider a cold air intake, low pressure exhaust, ecu, etc...

As for pulleys they lower the drive ratio on the engine to turn accessories such as the alternator allowing the engine to rev quicker.

Camshafts change the way the engine feeds and breathes changing the way the valves that control air intake and exhaust from the cylinder act.

Pistons are a more extreme mod in that they can help your engine handle more power and even increase the displacement and compression of your engine. Though the wrench time and expertise needed is much more.