Originally Posted By JohnRR
Originally Posted By rarefish
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.

Last edited by rarefish; 10/19/16 08:41 PM.