Anyone running the quiet iserts on the Yosh slip on?

[Quadfather]

I see Rocky Mt is selling the inserts for the Yoshimura pipe. Has anyone tried them? Do they rob you of any power? Will the ones advertised in Rocky Mt fit the "Offroad" slip on? And, is there a big difference in sound?

[chad400ex]

I've got them, they do make a big difference in sound, but you loose some of your airflow which tends to take away a bit of the power (but not much). I keep one handy (along with an allen wrench) in case the sound cops are out and about. They take about 30 seconds to change out, and I figure that $35 for the set is better than a $170 ticket. You only get checked at the entrance to the dunes out here, so it can be taken back out as soon as you are out of sight of the sound cops.