Exactly, if you wanna be in stealth mode, just stay off the gas and in the low revs, or when you're cruising, you won't hear a thing. It's only when you depress the pedal maybe halfway that you start to hear it rumbling and at WOT at high revs it sounds the business, very loud but very nice. And it's nothing like an exhaust really(which I hate). I highly recommend it, expensive but worth it. Looks good in the engine bay too
