Well, it makes the exhaust louder, but...
First of all, the product is extremely well made. No fitment issues at all. It does make the truck fairly loud, particularly on cold start and rapid acceleration. Fair when cruising around town, or at moderate highway speed (like 50-60 mph), at interstate speed (70ish) the drone gets to be a bit much. For me, it's annoying enough to be on the market for another product, probably a full cat back exhaust system with muffler. Wish MBRP did something to address the flapper valve issue; don't think leaving it in is the right answer. In any case, if about $100 is all you have - well, better than stock if you can handle the drone on the interstate.