And where did you hear that? I swear AEM was making close to that with their highport intakes?b13pnoysentra said:A cold air intake works by taking in air from the outside just like a regular air intake. The only difference is that the cold air intake's performance depends on the outside temperature. If it is cold, like below 50 degrees, your CAI will work very well, but if it is hot, it results in low performance. The average hp that I have seen people gain from these after market intakes range from 2-5 hp. Some market claims of reaching 10 hp with their intake for the B13 sentra isn't true.