I think the enhanced sound comes from two things... one, like you said, exiting a little further out from under the car. Also, the exiting pulses have a chance to expand a little in the bigger chamber of the tips, which helps take the edge off of the higher frequency end of the sound. Kind of like listening to music on your phone, and then putting your phone in a small bucket. Same sound, but bounced and filtered just a little differently, so it sounds bigger. Whatever it is, I'm lovin' the tips.