I don't know if this has been discovered yet but I found out today that a pcv valve grommet for a Chrysler will work for the grommet in the valley pan that the stock 7.3 idi turbo drain back sits into. I used this on my 6.9 during the addition of a turbo and it fit the valley pan nice after the removal of the stock valley pan to cdr valve grommet and it hugged nice on the drain back pipe.