changed out my standerd muffler to the big bore baffle,because of 107''.endend up with pretty respectable numbers imo.[IN SIG].man this baffle to me sounds,mean and angry,not to loud for my taste,deff louder than the louverd though.still can sneak around town fairly toned down,but in typical fatcat fashion just twist the throttle and she ROARS...has a nice deep tone at idle,can really hear them 551s gurgling around haha..thanks Tom.