Great price and fast delivery. Came earlier than expected. Installed it on my 2010 Chevy Silverado 5.3 v8. be adapted to each truck. My standard muffler was 3 inches. I added 2.5 twin tubes and 4 inch ferrules. This gave it an aggressive sound. at idle it has a deep rumble. the roar is imperceptible and does not disturb the cover or the music. Oh, and when you hit 2000 rpm you hear the sound of freedom.