JBF,
What vibration are you chasing? I ask since I have a slight vibration at idle when cold (very slight) after doing water pump (4.8is) and suspect 8 torque head bolts which hold in the the engine vibration damper. Seems to be conflicting info on need to replace or reuse them.
#8 in the diagram
RealOEM.com - Online BMW Parts Catalog
FXSLIN,
Nice looking! Even with that box
Do you notice a difference in mileage with the box on?