Super 44 has a very pleasant shade. Not loud enough to wake up the neighbors but loud enough to let you know who's coming from afar. Sounds incredible on a Fords Coyote 5.0L, low mileage, but cold air will do wonders for a properly done exhaust system. The best thing about the Super 44 is that it doesn't have the same hum as the Super 10, but it is noticeably louder than the stock 40 at all rpm. Great noise for the price!