What were used on 69 340's in 69 darts for mufflers? What is the closest replacement you can get?

Check with Accurate Ltd.

or your local autoparts store that carries Walker

I bought theses muffles for my 69 Dart GTS 340 from Summit earlier this summer. I too was looking for a aftermarket muffler that was close to the original factory mufflers. So far, I have not installed them as the car is still apart, so I can't report on the fit or their sound.

https://www.summitracing.com/parts/sum-631122-xl/overview/

2.25 in and out ... NOT stock on a 69 340 equipped mopar.

I assume he is looking for actual FACTORY replacement , Accurate LTD or Gardner will be the only place that has them.

Here is the muffler you are looking for , you may actually want the ACM-18 though , 1 7/8 outlet like stock ... even the 383 and 440 equipped A bodies used that muffler because they used 340 tailpipes .

http://accurateltd.com/A-Body-Factory-Replacement-Muffler_p_198.html

If it's not 2.25" in and out then what size was it on a stock 69 340 muffler? I talked to the people at Accurate and that's what I was lead to believe. The head pipes are 2.25" and I was told that the tail pipes are 2.25" and then reduce down to 2" along side of the gas tank for the factory 1-7/8" tips. Just when I thought I had this all figured out, I'm now learning something different.

Maybe this will clarify a few things. In 1967 and 1968 , 383 equipped a body cars
had 2" I.D. inlet and 2" I.D. outlet mufflers. On 1968 models when exhaust tips were first available , the two piece welded tailpipes reduced to 1-7/8" I.D. at the rear to accept the exhaust tips. In 1969 this changed for 383 , 340 and M code 440 models to 2-1/4" I.D. inlet and outlet mufflers. The 1969 welded two piece tailpipes were 2-1/4" O.D. at the front downsizing to 1-7/8" I.D. at the rear for the exhaust tips. Assembly line mufflers were welded directly to the headpipes for all models. To replace the muffler , the original muffler was sawed off of the headpipe and the replacement muffler clamped into place.

Tom do you have a photo of an original 2 piece tailpipe ?

John , Here is one we removed from a 69 340 Barracuda that had the original assembly line exhaust.

Thanks , that is very interesting , so the pipes I have are not factory then ...

Tom, Thanks for the tail pipe photo and also I appreciate you clarifying this issue. I have spent a lot of time trying to understand the factory exhaust mysteries for my 69 Dart.

No Walker or AP exhaust for 340 a bodies is available . Been through that futile search.