Just got the new 5.0 magazine, and they have an article showing an installation of a new, straight through Magnaflow muffler with some sort of a flapper valve inside that promises a quiet exhaust---WITH NO DRONE---for S197s---until you stand on it, at which point the flapper valve opens. The muffler is a bit longer than their standard muffler, so a custom installation is currently required, but a bolt-on version is promised.
A great idea, since all aftermarkets have some degree of the mind-numbing, dreaded drone at highway speeds.
A great idea, since all aftermarkets have some degree of the mind-numbing, dreaded drone at highway speeds.