jst8a5.0
02-21-2012, 09:02 PM
Has anyone heard the Dr Gas Frequency mod mufflers? I am thinking about trying them. They have a vid on youtube and i like the way they sounded on a 5.0. I know they sounded like flowmasters till about 2500 or so and then it sounded like it revved through the roof! Then they advertised it was only 4500 rpm. I like it