TTI exhaust muffler option
Joe,
I think the Dynomax Super Turbos are the quietest option TTI offers. I can take you for a ride in my Barracuda sometime and afterwards, I guarantee you will think that the Super Turbos are quiet by comparison. ;-)
Lee
P.S. My brother has the GLHS on the road and is planning to take it to Thunderhill in a couple of weeks.