Interesting, I don't have the drone effect at all with my car. I've run both Flowmasters and Magnaflows and these are the best by far that I've run when it comes to the mind numbing drone effect the others had.
I'll have to break down and replace my existing muffs with something that doesn't drone. I'm thinking turbo mufflers. I think I ran some turbos years ago after I changed the engine to control the level of the exhaust. I was running cherry bomb glass packs at the time and on a stock 383 they sounded good. After a cam change they were too loud.
