Most folks have said it's quiet. I installed one on the 429 Cobra Jet in my Cobra replica several years ago. Had several folks wonder if I had a supercharger because of the noise. Just my experience.
You had a Milodon GD and it made noise? If so, it was either installed wrong or it had issues and should have went back. I've used dozens of Mlodon GD's and never had a single one make noise.
