Sound wise, it should be a little louder & deeper. You can simulated by removing the stock air filter element and drive around the block. Just make sure nothing gets suck in to the engine. Try documenting the mileage difference if any before/after.

On my T when I modified the air intake box where I removed the elbow, I couldn't tell the difference, other than a little more noise. I may opt for the cheaper home-made version and customize a new air intake of my own. I have some ideas after walking up/down @ Home Depot. I will post it here later when I get to it.