You know, if it is on the web it must be true.
The M62 was a Gen 3 the M90 is a gen 4 and has always been on GM cars.
Ford on the other hand used the Gen 3 from 89-93' and in 94-95' used the Gen 4.
Gen 3 has bare rotors (not just that the epoxy came off), a lower intake port, no lead in on the intake, and what we called cleavage on the outlet. Gen 4's on the other hand the outlet is flat and has a larger outlet raised inlet (closer to the rear bearings) a nice lead in for airflow into the rotors.
like I said the GM cars never had Gen 3 M90.
when I get home this weekend I will post pics of the differences. I have GM M90's from 97-03' and Ford M90's from 89-95' and a few M112's.
Jeff
