How to increase the power of the BMW M9 engine?

I've been having problems with my BMW M9's engine power and I want to make some modifications. What are some recommended ways to improve its power and performance?

Adding a cold air intake and a performance exhaust system are simple yet effective ways to increase engine power. You could also consider upgrading the engine's air filter and spark plugs for better performance.

Another option could be installing a performance chip or tuning the car's ECU. However, be careful not to push the engine too hard as it can lead to premature wear and tear.