Forced induction is the term used to cover supercharging and turbo charging.
Prices can range from $3000 and upwards. Choosing the right one depends on your preference, budget, and the application it's being used for. It's best to do a lil research before taking the dive.
Many on this forum will have the DASC as it's a simple and economical way of getting more power from the engine M44 engine.
We use the custom RT setup, as our power targets are a lot higher than what the DASC can produce.
I hope this helps