Sound outside the car is perfect. Not too loud and a nice burble, especially at start up and fast idle. Not too loud inside the car, just the right volume, and overall good sound. I had a shop install the exhaust for $200 and they said it went smoothly, I let the install guy keep the Borla hat that came in the shipping box! I wish a set of exhaust tips was offered as an option, as I'm not a fan of the trapezoid-shaped factory valences on the Explorer, so I expect to but tips to replace those!
I'm in love with how the sound is "perfect". It's not too loud or quiet, but when you want it to be heard, it's heard.
I received my order and installed it with no problems what so ever . Keep up the good work .