Can the power of Lexus GS 300 (model 09) grow up? If so, how will it be revised?

Enlarge the air inlet and replace it with a larger mushroom head to reduce shock absorption and reduce the resistance of airflow to the car body. Try not to use wide tires. The lines of tires should be thinner to reduce friction. And clean the throttle regularly. That's all you can do. If you feel that the power is still a little poor, add gasoline additives, but there will be side effects.