How do you increase airflow in the engine?

To increase airflow in an engine, you can upgrade the intake system by installing a high-performance air filter and larger intake manifold, which allow more air to enter the combustion chamber. Adding a cold air intake can also help by drawing in cooler, denser air. Additionally, optimizing the exhaust system with headers and a less restrictive exhaust can improve airflow out of the engine, enhancing overall performance. Regular maintenance, such as ensuring proper tuning and cleaning intake components, also contributes to maintaining optimal airflow.