Thank you sir. So far, I'm really liking the Gibson system alot. It's so quiet, I can hardly tell I have it on! I'll tell you, the muffler itself is a class act, it's so well built, I bet I could drive over it without any damage. My mileage is about the same, ~145 miles at the halfway mark on the gas gauge, even though I'm a little more generous with the throttle when merging on the highway. All in all, a quality product.