Sounds great. I have a Ford 4.9 (Inline 6) and it's not the fastest, but with the flow meter and Y-pipe off the headers you can finally tell the difference in performance and sound.
Bought and installed on my 2015 Jeep Wrangler JK 3.6 V6. Deep and hoarse sound, not very loud even at WOT. The drone was low and unobtrusive. No improvements to MPG or HP. Recommend if you want something louder than OEM.