Hi all, Since we're talking early hp hemi exhausts, I was curious to find out what original application these exhaust manifolds on eBay are for. They appear to be the same design as the high performance/truck 4 bolts but only have a 2 bolt flange. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=34203&item =2454309894 Thanks Owen ----- Original Message ----- From: <lettercars@xxxx> To: <obiwan10@xxxx>; <chrysler300@xxxxxxxxxxxxxxx> Sent: Friday, January 23, 2004 2:19 AM Subject: Re: [Chrysler300] Exhaust and Heads on 355 HP 300 B > Hi Roger and All: > The 300B achieved 355HP thru the use of a higher compression head. I assume > it was just the regular one milled, but do not know for sure. The 355HP heads > were assigned different part numbers, 1730369 and 70. This would be the case > whether or not other changes were made besides just milling to achieve the 10 > to 1 comp. ratio. The Chrysler letter to dealers, dated June 13, 1956 > announcing the availability of these heads, does state they are not interchangeable > with the 9.0 to 1 heads on the 1955 model "300s". > Certainly the larger (3" dia.) exhaust system would also help with power > increase, although for gross HP rating such as 355 was, most of the system would > not be in place. > Of course, these changes were mainly for the purpose of keeping Kiekhaefer > (and others) competative on the racing circuit. I think he pretty much got what > he asked for! Hope this answers some of your question. 300ly, Gil > > > [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/ > > >