Since I have installed the Z-engineering mount from FS I have noticed something that I was wondering if anyone has had the same problem. I am guessing that since its stiffer is the reason why this is happening. I did a search and see some people were talking about vibration so this might be the same thing but I havent seen a fix for it. I have noticed that since I installed it my idle RPM's went down to about 750 from around 950-1k which would explain the vibration in my case I dont know about others. Is there a way to fix this or to just tap the idle up a tad to get the vibration to stop?