It is a re-engineered motor. It uses the same basic design as the 2007 and older versions but not all parts are interchangable.
Chrysler will be doing the same for the Hemi next year's model run.
This is buying time for the company's V8 motors as there is not the significant redesigns going into place as there are with the V6 "Phoenix" engine program (to replace nearly all the current V6 engines) and the Cummins diesel program (which brings three new diesels to the parts bins).
Last edited by rubicontrail.net; 11-13-2007 at 02:13 PM.