^^^ i agree with both of you
A car needs to breath like people need to breath, so if you make it breath better, With Intake and DP and Exhaust/Headers etc, then the car can flow air better and thus making more HP by getting more air into it. That's why its good to have turbo or S/C to increase that Forced Induction, and the intake is a Induction mod. Also its supporting mod as stated above.