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cnxt - Not sure what you have now, but based on your sound clips, Dynomax Super Turbos will NOT be as loud. I posted below a chart of different mufflers with the decibel levels.
Ron

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you know that by the videos I have found the superturbos look to be more noisy really than the ultarflows but I think is more high pitch related than effective NOISE...

Db measuremenst covers all the audio bandwidth, BUT the mid frequency are the most disturbing to the human at same leves than lower frequencies. So even getting same or more Db level on Ultraflows the lower frequency is less disturbing on them