Gary, I don't have a sound byte but have been running the Milodons on my small blocks for nearly 20 years. There are definite pros/cons to them. As far as sound goes, they are not nearly as loud/whiny as applicaions that have thin aluminum covers. The SB timing chain cover dampens quite a bit of the noise. If you like the whine that a gear drive produces, you'll be happy with it.
