340 stock exhaust manifold

[Racinjason]

I own a 71 duster with a 340 engine. What year 340 exhaust manifolds were the best as far as performance? What would the part numbers be for the best manifolds to get? Thanks

 

[abodyjoe]

68-70 have always been considered better flowing.. how true that it who knows...

casting numbers are 2863549 and 2863553

MOPAR 340 HP EXHAUST MANIFOLDS AAR CUDA TA CHALLENGER 2863549 - 2863553 RARE | eBay

 

[66fs]

The best are 1968 - 1970. I don't have my numbers books with me, I'm sure someone else will chime in. 1971 uses the standard center dump that is not as good as the earlier passenger side exhaust manifold.

 

[toolmanmike]

68-71 numbers are as follows

68-70 have always been considered better flowing.. how true that it who knows...

casting numbers are 2863549 and 2863553

MOPAR 340 HP EXHAUST MANIFOLDS AAR CUDA TA CHALLENGER 2863549 - 2863553 RARE | eBay

There's your answer!

 

[Racinjason]

Thanks for the help

 

[VOETOM]

I have the right side I need to get rid of. It's for sure not perfect and kind of scruffy looking but someday if you decide you need one, holler at me.

Tom

Thanks for the help