Originally Posted by willwren
coupler and the bearings in the nosedrive are common between the M62 and M90. Nothing else.
items in the pic below, including the rear needle bearings, are shared between M62 & M90 superchargers.
Only oddball items I've run across are...
(1) Nissan Frontier M62s use a larger rear rotor brg
(2) Had a Saleen M90 in for rebuild and it carried a larger OD rear snout bearing. This was probably due to a spun bearing somewhere during its lifetime and the resultant overbore of the snout housing needed to fix/save the snout.
hope this helps clear things up,