06 sti knocking propshaft!
 

the propshaft on my 06 sti has started to knock on the drive train tunnel it appears to be coming from the bearing / rubber mount area. does anyone have any ideas. i have a miltec exhaust on with the 100 cell cat & the cat is right under the mount could the heat be causing this as it gets worse as the car gets hot ie the rubber getting soft cheers. :wonder: