67 Dart Post Project

I noticed this weekend that there was a clanking sound when the car was idling. Turns out it is the valve in the Dynomax VT mufflers...:banghead: I called Dynomax and they said the valve shouldn't be open at idle and it was most likely due to the large cam that I'm running. They recommended switching to part number 17957 instead of the 17157 I'm running. Apparently the 17957 has a stiffer spring. At least they are swapping them out for free. I just have to do the labor.....