The blue suspension blocks that come with the 414MII WRC are weak !
. From what I can tell, this is because of the amount of material that has been shaved off from the original silver block.
The info for the block is :
3454156, TAMIYA, Suspension Arm Block B (414M Worlds Replica Chassis - Blue)
I ordered mine from rainbow ten. I'll probably order some more since I have no more spare.