Help me get rid of the annoying vibration

Nah, if nething the overall size is bigger in diameter. I ottienger 18's paired with some Kuhmo Ecstas (not sure what size), but they fill the wheel well with just enough room to spare.

A bulk pack of Dynamat Xtreme doesn't weigh anywhere near 90 lbs.  A bulk pack contains 9 18" x32" sheets.  There is no way a sheet of that size weights 10lbs.  I lifted 90 lb dumbells in the gym today and handled a bulk pack a few weeks ago.  They aren't even close.  Maybe you made a typo? ;-)

I don't know what I was thinking.  1 bulk pak is about 30-50lbs.  I'll be picking up 3 bulk paks next week for installs so I'll post the exact weight then.

Hurtado, did you mean my oil pressure? It is always at 3 bar when driving. When idling it sits a little lower. 

Are you sure that's the symbol for oil pressure?  Whatever it is I don't think it should be at the max but you were pushing your car to its limits. 

Does the weight to the sound dampening material differ significantly with brand?  I can't accurally recall what the 100sq. ft. from e-bay weighed but it did feel like it was more than 30lbs.

B-quiet specifies on e-bay to be 0.3lbs/sq.ft.

Black Mat     .56 lb./ft²

Dynamat     .45 lb./ft²

Brown Bread     .40 lb./ft²