I have Flowmasters on my 440 Power Wagon. They actually sound good in that application.

THIS is what I felt like after a long drive with the Flowmasters in the Charger:

Let us know how you like them once installed ? I personally like the flow master sound and I’m wondering what you think of what you ended up ordering.

Just by the air flow and sound level the Dynomax Ultra Flo's are in a league by themselves 101% flow I thought that isn't possible. 1% more flow out than in

Well, the Dynomax are not going to fit, way too long for the Cuda. So going back to the Flowmaster 40 and then run a couple of short glasspacks near the tailpipe extensions. Wish the Dynomax would have worked, but I am moving on.

If you're going with flowmasters get the super 40 they are a lot quieter on interior noise.

They make different sizes, I can’t see why you can’t get one to fit.

Yep,if the make a Flowmaster to fit they also make a Dynomax ,just look in the right place!!

Searching Summit, they show Dynomax Ultraflows case sizes in 14, 18, 20, and 24 inch lengths.

The 17289 recommended on the first page are 20".

Everytime I read one of these muffler threads I always wonder why no one recommends Borla's. They are just like the ultraflows but don't have the history of blowouts or other defects. They are a great flowing muffler, sound awesome, and last forever. Just wondering...

I run a pair of Borla ProST-mufflers on my '73 Dart.

I'm running Flowmasters 50s which is the quietest one they offer. On my 70 Dodge Charger. Is a 3-inch TTI full headers and exhaust. Personally it sounds good from fifty to a hundred feet away. On my son drove around the block oh was it sweet. But in the car it's a tad on the loud side. Which brings me to my next question since we're on a muffler post.

I would like a quiet as in real quiet Muffler. What would you guys recommend? ,( I don't mean Buick quiet, but close to it because quite frankly I'm getting old. And I'd rather hear the radio).

I've got a pair of Flowmaster 50s under my '62 NewYorker wagon.
It has a stock diameter exhaust and the engine has carboned-up the mufflers pretty good to have given them a fairly toned down sound.
I kinda like it because when the engine is idling or when driving you can hardly hear there are Flowmasters under the car. It only is noticable when getting on the throttle.

I have Flo Pro originals, which is kind of like a welded turbo muffler with no packing. I like them. They might be too loud for people who want to listen to the radio in the car. The muffler shop refused to put on anything else after I blew up a Cyclone Sonic Turbo. That was a long time ago.


Naybor got one of those must4ngs with a muffler delete, so I was going to get Pypes Violators. He got a quieter system tho, so I left the Flo Pros.

I read the chambered mufflers like a Flowmaster for some reason get really hot. Don't know first hand if that is true or not.

Flowmasters...if it's to loud you're too Old...

Open headers if it's like that.

I've always wondered...

When you're getting old, most likely you'll become hard of hearing too.... Wouldn't that be a reason to start appreciating FlowMasters a bit more?

In my book the FlowMaster mufflers are more of a senior citizen muffler...

Because Borlas are stupid expensive and I've never had any issue w/ the cheaper brands "blowing out".

I put Ultra Flos with a 20 inch case on my car to replace some Thrush Hush Turbos with a 14 inch case (very similar to the Dynomax Super Turbo). The Ultra Flos are actually quieter.

This is with 3 inch pipes, and those Thrush Hush necked down to 2.5 or less internally.

I'm very surprised at how quiet the Ultra Flos are with the long case. I had 14 inch case Ultra Flos on it before, and it was too loud to hear the motor (fresh motor), which is why I band aided it with the cheap Thrush Hush. Really, you would not think that this car has straight through mufflers with 3 inch pipes dumped at the axle now, except at WOT.