Interesting Cadillac will reduce the engine capacity from 6.2L down to 5.5L in an attempt to help IMSA BOP targets.......seems like IMSA and Cadillac had a quiet kitchen discussion and agreed the 6.2L was a bit of a joke and causing everyone an un-needed BOP headache.
http://sportscar365.com/imsa/iwsc/ca...ed-dpi-engine/
Seems like a case of collective stupidity to me, mostly on IMSA's side, whereby they should not have allowed such a huge engine capacity to compete in the first place.