Re: [Chrysler300] 300D Exhaust

[lettercars@xxxxxxx]

Hi Terry and All:
Am finally getting around to answering the 300D convert exhaust question.  
The car uses four mufflers----Chrysler does not use the term resonator 
here----two within the "X" part of the frame, and two behind it, right by the hangers.  
Specs and part numbers are:
       Front: 2 #1736810, 15 inches long, 2" inlet, 1 3/4" outlet.
       Rear:  2 #1736802, 12 inches long, 1 3/4" inlet, 1 3/4" outlet.
       Connecting pipes are both PN 1736770.  (Not that any of these PNs will 
do any good!)
The 300C and 300D convertibles had the same exhaust system as the NewYorker 
converts, and had to go to the four muffler arrangement apparently because the 
coupe/sedan muffler of 35 inches would not fit within the confines of the "X" 
frame.  It seems that they could have made the diameters larger to match the 
coupe 300s, but that would have meant 2 additional muffler PNs plus the 
inter-pipe.  Evidently they didn't think it was worth it.  (Or perhaps the frame 
would have had to be modified too)
For your information, the May 1958 Issue of Motor Life shows two excellent 
views of the 300D convertible frame and exhaust arrangement.  They were quite 
taken with the "3/8 inch
thick H section" crossmember, apparently.  The rear mufflers, according to 
Chrysler engineering specs, have only one tube in them rather than the usual 
three.  The motor life pictures seem to confirm that, as the entrance and exit 
are both off center on the same side.   Hope this helps a little.  300ly, Gil C.


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