Looks like I am a little behind on this thread let's start from the beginning. I took them out of our 2016 expedition about 2 months ago. You will see a gain in turbo whistle especially with the windows down you hear them spool up really well. I did a cold start with the hood open in our garage before and then after and I can tell you after they are out the were a lot louder in the garage. Cruising around town you still won't get that crazy spool you would hear on a Cummins, Duramax, or Powerstroke. Although I did see a 1 mpg increase. Try it if you don't like it put them back in.
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