Won't do a single thing.
Your car HAS a cold air intake.
Go pop the hood.
If you can't tell why it's cold air intake, you need to stop, and learn about what you're doing.
A cold air intake leads away from the warm air near the engine, towards colder air near the front bumper.
That's what your stock intake does.
All an aftermarket one does, is change the piping with something shiny, and claims it helps.
In older cars, there's a chance that the stock intake is overly restrictive. But in modern cars, they're designed to be very efficient anyway. So, there's really no room to improve on them, that can be noticed.
On average, during normal driving, you will see ZERO additional power.
As far as fuel efficiency, you will likely attempt to drive it it harder, because you will have the placebo effect of thinking it's faster....so you'll lose a few miles per gallon.
Until you realize that the car isn't faster, and you stop. And then you'll be back to normal mpg.
It's an utter waste of money.
