Watch the install video on YouTube by nitroZ18 fishing, best one I found. Watched it twice, never read the install instructions. Mpg has immediately increased. Trips i would routinely get 14-15 mpg, I'm now getting 16-18. This will give you better horsepower, torque, and mpg compared to something like a k&n, but youre sacrificing sound due to fully enclosed airbox. Personally I would rather have way better performance than a better sound. Only annoying part, can't find a backup air filter on their website, but if you chat them, they will send you a purchase order so you can get one.