I replaced the factory "log style" manifolds on my 66/300 with ones I got from a '69 B-body with a 440HP. They are much swoopier and actually allow better spark plug access. The casting numbers, which I just went out to the garage and read, appear to be 2843992 on the left, and 2808800 on the right--although the 88 may be a 69 (tight space made reading difficult). I don't remember what the outlet diameters were, but I still do have a spare set of gaskets, and they measure 2-3/8". I also have, laying in my garage, a manifold with a casting stamp 2853409, which looks very much like the one on the car. I measured it's outlet at 2-3/8". Jack ------------------------------------------------------------------------ ------- On Feb 15, 2006, at 6:12 AM, Carlton Schroeder wrote: > > 3) Are there any big block exhaust manifolds, other than something > like the Max Wedge manifolds, that would have a 2 1/4 or better yet > a 2 1/2" outlet. I thought there would be numerous 440 manifolds > like that but I haven't found any. I have seen some manifolds that > appear to have less restrictive flow lines, but they were also 2" > outlet. I am a little surprised but I guess the 300H had 2" dia. > manifold outlets, like all the other models - is that right? How > about that higher horsepower H - did it have larger manifolds? > > Thanks for your help. > > Carlton. 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/