I was happy too. But the exhaust is rattling BAD. And I can't even talk to anyone.
I used to be DMH's biggest fan.... Starting to fall off the bandwagon.
Mine is rattling too. Here's what Badlanz sent to me as a possible solution:
You could have a loose shaft that goes thru the valve housing. Quick fix is to lightly tap on the shaft to just tweak it with a little bend and it should tight up. There should be no play or slop.
I haven't had a chance to try it yet though.