[RarlyL8]

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What is the "high pitched and whistle" sound that you don't want? Typically the louder the muffler the more turbo whistle you will hear. Is that the sound you don't want? I don't know of any high pitched mufflers as the 930 engine does not produce a high pitched sound. My tuned headers produce a higher note than other systems but I don't think that is the sound you are talking about. We offer 3 sound levels with every system. The Outlaw version uses a bypass pipe in place of the muffler body. The tailpipes make that system not a loud as a zork pipe but very aggressive for the street. The Hooligan is more muscle car sounding and fairly civil for wife's and neighbors. With both systems you can hear the turbo whistle.

A few years back someone made a large can that looked like the stock muffler with a 4" tailpipe. Extremely loud as it acted like a resonance chamber. I'm not sure what you are after but there are some loud ones out there.