Would love to know how all of these different brands compare with the stock-sounding mufflers offered by some companies, such as Accurate. As an old guy, I still remember how nice the 340's sounded from the factory back in the day. As an aside, I have Dynomax Super Turbos on my built Sport 340. They're loud at cruising speed, but that may be because, as I said, I'm an old guy now.