a intake is not going to guarantee a decrease in your times, there are variables, such as temperaturs, tire temps, rpms, etc... there are no guarantees in any upgrade. I bought at aem for my integra, there were points were i got 33 mpg doing 100 mph from nyc to albany and there were points were i got 18 mpg from albany to albany. Then you have 90 degree heat and 30 degree heat, fact of the matter is there are variables, it's a fact of performance and of hp.