i've heard a raptor truck leaving the gym where my brother and i looked at each other like "uhhh, no" (LOUD catback) , but the 3.0 in the braptor makes decent noises. i have been pleasantly surprised.im not at all a fan of mine. I have aftermarket downpipes (w/ cats) after my OE ones failed. I like the turbo whistle at startup but glad it only got a little bit louder @ wot.