First off, shipping couldn't have been any better! The product even shipped before the date that was displayed on the website! Couldn't be happier with that! Now, for the intake. The Volant intake set up is the nicest I've seen. Directions for this were a little confusing, but I was able to install it without a hitch. And I have no mechanical skills what so ever. Just common knowledge is all you will need. The sound of this thing in park and tapping the accelerator, is awesome! I have noticed, while driving, that the car has a lot more power, accelerates smoothly, and a lot easier than with stock intake. Even acceleration on the freeway at around 70 mph, it still has power to go some more. This intake has made my car more fun to drive, and was well worth it in every way. As for GPM, I have yet to see a savings due to being on the throttle so much. I can't help it, it is just so fun! I recommend this product to anyone that wants a quality built item that will not only enhance the performance side of your vehicle, but for looks as well.