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The MP finned aluminum valve cover sits roughly a 1/2-inch higher on the raised port Indy head. In this situation the Hemi D.U.I. clears the MP valve cover by an 1/8-inch. Note: the 440 D.U.I. will not fit a RB engine with Indy heads. This was why we trial fitted the Hemi D.U.I. on this Indy headed RB motor.