M-Code exhaust

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440 Mike

440 Mike

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Does anyone know what the exhaust pipe diameter was on the M-code 440 darts? Were they 2-1/4 head pipes like the 383's or larger? What about the tail pipe diameter?
 
I don't know for sure but I will tell you that I have a factory exhaust system off of 440 car I'm not sure which one with the factory h pipe and it is two and a half inch OD
 
440 Mike said:
Does anyone know what the exhaust pipe diameter was on the M-code 440 darts? Were they 2-1/4 head pipes like the 383's or larger? What about the tail pipe diameter?
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They use 383 head pipes so they are the same size
 
My 69 Cuda 383 has 2.5 inch headpipes, not 2.25. The car has never been restored (it needs it), and the pipes look original to me.

I think I read somewhere that the 69 383 A bodies got 2.5 inch head pipes, but I don't know how I would ever find it again.
 
Accurate has an M-code 440 system listed but they don't say what the diameter is. I'll give them a call.
 
I don’t believe 383 ever came with 2.5 head pipes from the factory.
 
Gardner Exhaust just replicated the entire M-Code exhaust headpipes to mufflers to tailpipes of NOS parts I gave them to use. Like said above, they are 383 pipes with the only difference being the 3/4" spacer for the passenger side...
 
69 would have the same tailpipes as a 340; 2.25" to 2" to about 1.750" or so where the tips slid inside. (I edited my original poor description here).
Just checked my 69 parts book and the tailpipes and mufflers were the same for 340/383 as well as the front manifold to pipe gaskets on 383/340.
 
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VOETOM said:
69 would have the same tailpipes as a 340; 2.25" to 2" to about 1.625" where they slid into tips.
Just checked my 69 parts book and the tailpipes and mufflers were the same for 340/383 as well as the front manifold to pipe gaskets on 383/340.
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Here are the NOS 69 A-Body 340/383/440 tail pipes I bought at the WPC swap a couple of years ago, definitely different than my NOS 68 pipes...

Tail pipes 340 383.jpg
 
And here are my two factory tailpipes to show, like HEMI Dart did, the flats and reductions in the factory pipes.
Andlike HEMI pointed out, 68s had 2" tailpipes and they were for sure different. Their mufflers had 2" outlets .

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A 69 340 has a right side that is about 2.5" ID for very short distance then it drops to 2.25". However, the drivers side is only around 2" and then welds inside a 2.25" tube after a foot or so from the manifold. Really bad exhaust flow on one side and really good on the other.
 
Partial update:
Accurate does have a selection and up-charge for the M-code Dart on a complete system. They also have separate listings for 2.5 inch head pipes for the 440, and 2.25 for the 383. Waiting to hear back from tech to see what size the tailpipes are in the M-code complete system.
 
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440 Mike said:
Partial update:
Accurate does have a selection and up-charge for the M-code Dart on a complete system. They also have separate listings for 2.5 inch head pipes for the 440, and 2.25 for the 383. Waiting to hear back from tech to see what size the tailpipes are in the M-code complete system.
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I bought a complete 383 A-Body kit from Accurate 20 years ago and it came with a 2-piece headpipe, and the mufflers had to have two reducers to use the NOS tail pipes I had. They said if I would have picked them up at a show pre-ordered I could have gotten one piece headpipes...
 
I Have a set of Head pipes that I got off of Accurate years ago for my M Code Cuda. I was at Mopars at the strip and they said they were for a Dart but would work ona Cuda. Bought them, Hung them on my wall till needed for my restoration. No they don't fit a Cuda. Contacted Accurate and they told me I need ones for a Cuda not a Dart (Go Figure). And also they don't ship to Canada. So I have a set of one piece Head pipes for a Dart if anyone needs. Only trouble is Shipping. PM me if interested
 
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