4772576 HEADS built from new castings built by Mopar Performance to replace the 308 head. Never came on a car. Built for Performance, Racing valve job, bronze guides 1.88 Manley Pro flow valves, milled to stock cc's, 10 degree keepers and retainers and NASCAR valve springs. Never driven on the street and were on my Duster when it set the NHRA National Record and won class at Indy. I used these heads from 2003 thru 2005. Stored ever since. $750.00 plus shipping.