These Borla pipes made my Vette enjoyable again. The previous exhaust was loud and had major drone. The Borla has no drone whatsoever at any rpm or engine load. They are quiet when cruising, but sound off like Gabriel's trumpet when you get on it! A great sound, a great value, and no drone. Finally, a quality product that performs as advertised. You will not be disappointed with Borla. Well worth the money.