Like was said in an earlier post it's a close copy of the bullitt intake. The main difference is you'll be able to use your stock alternator, and your stock throttle body. If the opening on the back is the same as the bullitt, then it should be about the same size if not a little bigger than of the opening in the center of the plastic intake. One thing to consider is I only gained about 5hp from going to a bullitt intake when I was N/A. So if you don't ever plan on going with a blower, I'd replace the plastic intake if you ever need to. But I do agree I like the look of the aluminum intake under my hood!!