Each spring leaf is stamped with its factory part number. I do not know what the 60 or 7 is for. The 390HP 300Cs used the original equipment 300C springs and why not; they were already Heavy Duty parts. Wayne -------------------------------------------------------------------------------- Date: Tue, 24 Jan 2006 21:50:02 +1000 From: "christopher beilby" <thelastbestgenius@xxxxxxxxxxx> Subject: BJ and 300C rear spring id? 2) Pulled a rear spring from 2 of my 300Cs. On the underside of the bottom plate on each are two numbers - 1737037, and 1731737 (if I copied them correctly) - one of which is crossed out with stamped xxxxs. After this is DdCc stamp and numbers 60 7. Anyone know why stamped like this, and what does the 60 7 stand for - obviously both seem original fitment, and the two cars were built only days apart. Both seem not to have been painted. And final question, were the 390hp cars spring rates heavier/stronger, and if so by how much? Christopher [Non-text portions of this message have been removed] To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/