Posted By: can.al
... mufflers - 05/11/13 01:31 PM
..what are the quietest performance mufflers?
... mufflers
Posted By: therocks
Re: ... mufflers - 05/11/13 02:54 PM
NAPA used to have Hemi replacement mufflers.I had them on the 65.Now I run Summits stainless.They arent factory quiet but not loud.They are just mellow but they have a sweet sound when you get into the go pedal.That and they never rust.Rocky
Posted By: Junky
Re: ... mufflers - 05/11/13 03:47 PM
Quote:
..what are the quietest performance mufflers?
Quiet and Performance = Oxymoron
Posted By: can.al
Re: ... mufflers - 05/11/13 04:35 PM
..i have been told the Cadillac mufflers were very quiet and high flow.
Posted By: 1Fast340
Re: ... mufflers - 05/11/13 04:40 PM
Quote:
..what are the quietest performance mufflers?
please give us alitle more to go on here. what kind of car,how is it used,enginespecifications,headers,pipesize,where does your exhaust end any crossover?
Posted By: can.al
Re: ... mufflers - 05/11/13 04:47 PM
..'69 Dart,stock 8.5:1 340 and thinking 2 1/4" exhaust
Posted By: 1Fast340
Re: ... mufflers - 05/11/13 06:42 PM
a basicly stock lowcompression 340 with 2 1/4" pipes will probably like some dynomax superturbo mufflers,pretty quiet but with alitle rumble like a musclecar should sound. 
Posted By: Anonymous
Re: ... mufflers - 05/11/13 06:51 PM
Quote:My Buick Grand National was whisper quiet. Quickest car built back in '87.Quote:
..what are the quietest performance mufflers?
Quiet and Performance = Oxymoron
Posted By: WO23Coronet
Re: ... mufflers - 05/11/13 07:11 PM
Quicker yet if you got rid of the stock quiet exhaust
Posted By: Lee446
Re: ... mufflers - 05/11/13 07:37 PM
The turbo quiets it down a bunch also. To the OP, like said, pipe size has a lot to do with it. Generally a 2-1/4 muffler is quieter than a 2-1/2, a 2.5 is quieter than a 3" in the same application. an X pipe changes the tone and seems a bit quiter than an H-pipe that tends to deepen the tone. Like most things, there is no single answer.
Posted By: DrCharles
Re: ... mufflers - 05/11/13 07:58 PM
Quote:Quote:
..what are the quietest performance mufflers?
Quiet and Performance = Oxymoron
Well.... you can have quiet, performance, small size. Pick any two!
I'm wondering what to use on my '72 Dart 451. So far I have headers and a 3" Summit X-pipe. There is now a fuel cell in the trunk so all that space underneath (where the stock tank used to be) is available.
Posted By: can.al
Re: ... mufflers - 05/11/13 09:49 PM
..i'm thinking no one feels their muffler is quiet!
Posted By: 1Fast340
Re: ... mufflers - 05/11/13 10:05 PM
Quote:
..i'm thinking no one feels their muffler is quiet!
like i said,for your application some dynomax superturbos will be the quietest best flowing muffler you can find
anything quieter will restrict power and anything more open will be louder but not gaining any more power.i have over 10years of experience in the exhaust bussines and helping someone with a mufflerchoice is difficult to say the least but i feel confident you would like these mufflers
Posted By: Pacnorthcuda
Re: ... mufflers - 05/11/13 10:47 PM
Quote:Quote:My Buick Grand National was whisper quiet. Quickest AMERICAN car built back in '87.Quote:
..what are the quietest performance mufflers?
Quiet and Performance = Oxymoron
Fixed it for ya!
Posted By: Tom Hand
Re: ... mufflers - 05/11/13 11:41 PM
All our performance testing and sound testing indicates that the large case Dynomax Super Turbo "Hemi" style is best. 2.5" in and out, offset-center 17748; and the 2.5" in and out offset-offset 17749. Flow well and sound good and are pretty darn quiet. Some resonation will be present depending upon engine and tailpipes, and crossover style but overall, these are some of the best.
Tom Hand
Tom Hand
Posted By: can.al
Re: ... mufflers - 05/12/13 12:43 AM
Tx Guys..i'll find someone who's running super turbos on a 340.
Posted By: gch
Re: ... mufflers - 05/12/13 02:03 PM
The hemi super turbo mufflers quiet my 496 quite well.You could also try the dynomax VT muffler for the ultimate in cruise quiet until you hammer it.
http://www.dynomax.com/mufflers.php?muffler=vt
http://www.dynomax.com/mufflers.php?muffler=vt
Posted By: jeff57
Re: ... mufflers - 05/16/13 04:33 PM
30 yrs in muffler bizz, i have tried em all and dynamax is what i put on my 69 dart\340 4spd.very good. 
jeff57
jeff57
Posted By: Paul_Fancsali
Re: ... mufflers - 05/16/13 09:14 PM
DYNO MAX is the best quiet wise Thrush welded is a lot louder but not too bad