I beg to differ? For an all motor car and the price that people drop for cold air intakes/exhaust ect… I think w/ proper tuning the air flow manipulator can be beneficial as far as bang for the buck goes. I still don’t think that you would ever see more than 15hp w/ it but some CAI’s aren’t even adding 2-3hp for $200+ price tag. Remember car makers are putting tunes in for a good fuel economy as well not maximum power, especially a sentra.