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Who has tried this muffler?

I purchased the “headers back” kit for Mr b body from jegs about 3 or so years ago. It came with the Dyno max mufflers. I love the sound ! It actually got even better (jmho) when I ditched the headers for stock manifolds.
I had flowmasters on my long gone ramcharger with headers. That was much louder ( according to my future father in law) .
 
I've had Flowmasters or knock-offs of them on several vehicles and always liked that echo sound. Two 440 powered old Trucks, a 440 Trail Duster, my 67 Dart and the '70 Charger. My first experience with them was maybe 1992....a buddy that had a stock 400 in a 72 Firebird. Man that car sounded great
I've read that they don't flow as well as some other designs but I wonder at what RPM point that really matters? I'm not revving mine much past 6000. I'm not racing this car in some series where everyone is aiming for the last bit of power to be competitive. This car is just a toy for me. I just want to have fun with it.
 
I've had Flowmasters or knock-offs of them on several vehicles and always liked that echo sound. Two 440 powered old Trucks, a 440 Trail Duster, my 67 Dart and the '70 Charger. My first experience with them was maybe 1992....a buddy that had a stock 400 in a 72 Firebird. Man that car sounded great
I've read that they don't flow as well as some other designs but I wonder at what RPM point that really matters? I'm not revving mine much past 6000. I'm not racing this car in some series where everyone is aiming for the last bit of power to be competitive. This car is just a toy for me. I just want to have fun with it.
I could tell a difference at WOT under 4000 RPM. I think the only way to know for sure on your specific motor is to try them.
 
Didn't remember what series flowmasters I bought back in the fall of 96. Thought they were 40's but just looked at Summit for 3" in/out and 17" case and 50 series Delta Flows show up so guess that's what they were/are, but just aluminized not black. Back then the 330 only had a real mild 452", just a torquer intake, finderwells, 4200 converter, and 4:30 gear.

Now days with those muffs and 500", Big roller, 2-1/8 primaries, 3" pipes, dump at the axle, no back seat,
...it's Earschsplittenloudenboomer at Idle, and a Thunder Storm when you blip the throttle.

Would like to quite it down after I get it more roadworthy.
 
The Flow Masters sound great for sure. The longer the muffler, the quieter it will be. I wonder if the Flowmaster 40's come in a longer length.
 
The Flow Masters sound great for sure. The longer the muffler, the quieter it will be. I wonder if the Flowmaster 40's come in a longer length.
Maybe, there's a bunch of variations. Kerndog wants more sound, he'll get it with a 40 or 44, both two chambers. The delta version will have a different sound than the originals, I think.
Personally, I would not consider any fm without three chambers, trying to avoid too-loud,too droney.
I wanted the least restriction I could get, the quietest fm I could get, and no neck-down from a 3.5 collector. So... GIANT 535 series big block (diesel truck original app, I think) on my 62.
If I had to do it again...... I wouldn't do it again, lol.
I'd get a summit 3" kit, and dynomax ultraflow welded, call it good.
 
I put Flowmaster 44 mufflers on my wife's Challenger and the passenger's side one started rattling when the car was cold. The baffles had broken loose. It would stop rattling once the car warmed up to temperature. I replaced the right one,then the left one started rattling just like the other side did. Now I have to replace it too. I bet after I replace that one the resonators will start doing the same thing.
Probably due to Flowmaster mufflers are now made in China..
 
I was just on Summit racing & Flowmasters has a new-ish muffler
In stainless steel Flowmasters FlowFX it's a replacement muffler,
it's like $53.99 for 2.25" & even a 3" for $53.99
straight thru reversable perforated pipe design/going thru at an angle
centered on one end & an offset on the other end
not sure what all other size pipes are available

Exhaust Flowmasters FlowFX Mufflers 3 in. stainless steel stright thru offset flo-71229 $53.96.jpg


others by Flowmasters, this is an older add no FlowFX shown
Exhaust Flowmaster Application Chart.jpg
 
All my opinion..... which is what a muffler choice comes down to every time anyway!! :)

In WI, it is humid. Non-stainless flowmaster of any type, if you drive the vehicle quite a lot(like a daily to work) will last maybe 5 years. Not counting winters here, just normal driving during the summer. The humidity in the air plus heat cycles a couple times a day = rot out.
Magnaflows of same non stainless type make it an extra year.
Anything by Walker of non stainless is 4.

I mean they won;t blow out, but when you look they will be rotted and you will be worried the tail pipe is going to let go.

Now, for limited runs, stailess longevity might not be a worry. If you get ten years out of a regular one because of intermittent use, who cares then! Is getting 15 out of a muffler that costs 4x as much worth it?

Now for sound, totally my opinion......

Flowmasters sound good in smaller diameter, but 3" and up NEEDS a big block or they will drone bad. Or tall gears to push RPM up. Buddy had dual 2" on a chevy 305 car and it sounded mean. Different buddy put a 3" dual set on his 5.0 and you had to roll the windows down in the car or go deaf.
Magnaflow have a more "pulse-y" sound, still smooth but not as echo/roar blended as a flowmaster. I like stainless magnaflow. Quality is not as high as it should be for price but they don't give up classic sound IMO for the stainless.
Gibson makes a top quality product and you buy what you want for volume. Very simple explaination they have for it: you want less noise, they increase offset of pipes in the chamber to force the gas to change direction more. More noise? straight through. Quality products.
Dynomax is a budget brand. Proper size for application and it will sound pretty good, but not as good as it could.

Modern Borla has gone full blat pipe, and sells to new corvette guys and obnoxious mustang guys. Yuck. Not only does it blat and pop under throttle, it pops like a handgun on decel and there is no classic V8 rumble, just a raspy howl. Combine with X pipe for maximum millenial obnoxious mustang sound.

NOS 1990's Borla? Best sounding muffler ever. A full system? Best scavenging/performance/sounding systems. No drone, loud when you want it, not so loud for in town at 25mph. Good luck finding that stuff anymore.

Bassani stainless.... hard to find. Super high quality. Like, could hang it on a wall and admire it good. They made bike stuff, so they know how to make things sound how they want.

Glass packs. I think people know what they sound like. Younger folks will grin ear to ear if they haven't heard one before. I stuck a stainless built, straight through 18"-er on my dakota when I took the cat out(totally plugged) to act as resonator because I haven't done factory muffler yet. Made the truck instantly sound like a 70's beater hot rod. Makes the boy laugh when I rev it in the driveway or do righteous burnouts.

my personal preference for Mopars for sound ONLY(performance is different)
Manifolds, not headers.
A custom Y pipe, usually 2" into a 2.5 or 3 single(small block)
Glass pack, but a LONG glass pack. Not some silly 12" firecracker inducing pop maker. Last one I used was 24" on a 2.5" for a spruced up 318 that liked to spin.
Tail out behind rear wheel if possible to help keep sound out of cabin. Less important on a truck.
Big blocks need a dual set up. I prefer dual 2.5's, but it needs to be mandrel bent. My favorite so far was some not quite straight through Gibsons. Enough to take the rasp out. H pipe is better then X on a big block.

I had a full stainless Magnaflow on my 2001 ram 360 magnum. Sounded really mean, but maybe a bit loud at low rpm for daily driving in town.
The 94 Mustang I built got an "offroad" bassani stainless X, into a NOS 90's era Borla cat back system. Sounds absolutely like a dream. (boy owns this now) Modern Borla can go die somewhere. Old Borla they knew what was up.

Again, opinions, every one has them.
 
That was a well thought out contribution. I do appreciate it.
These Ultra Flo mufflers don’t sound bad but they rounded the edges off of the tone. It was like the crisp and sharp tones were gone like you turned up the bass and turned off the treble.
I haven’t had drone with mufflers or if I did, it was so long ago, I don’t remember.
If I did go back to Flowmasters I’d use the 50 series to at least have some semblance of civility.
 
The original Flowmaster mufflers from my car are now in my 75 Power Wagon.

2DCEE5B7-6DA5-4E71-B150-DD9BAAF13E22.jpeg


21 years old and still in great shape.

BEC1D910-B7EE-444A-B738-36662D25B86C.jpeg


Part #42541.
 
Product description:

5A5589A0-88E6-4F71-8CEE-C0B113E954F4.jpeg


Heh heh heh…

FDCE14C2-5A5B-447B-B50C-552E0AD40C43.jpeg
 
Greg, once this thread has come to fruition, I would like to bomb it if you wouldn't mind. lol
 
I'm not sure what you mean. Is this a tired topic that annoys you?
If so, I get that.
I've seen members suggest use the search function to find commonly asked topics.
While I do understand that sentiment, the search function here is not good. It friggin pisses me off far more than it helps.
I have typed in what is damned near 100% of the exact title of a thread that I started and nothing comes up. Some simple word is missing but other unusual words are typed in yet nothing comes up. You'd think the unusual word would trigger a hit but it rarely does.
I've had threads about Classic Auto Air, Borgeson steering box, my engine rebuild of 2022 and numerous other topics that take several word combinations to get them to come up, while other innocuous topics come up with gibberish typed into the box as if it were magic. I have had to scan multiple pages of the specific sub forum to find a thread when the search function failed to find it.
I like to post a link to an old thread to help people through a project that has been thoroughly covered before but it isn't easy.
 
I'm not sure what you mean. Is this a tired topic that annoys you?
If so, I get that.
I've seen members suggest use the search function to find commonly asked topics.
While I do understand that sentiment, the search function here is not good. It friggin pisses me off far more than it helps.
I have typed in what is damned near 100% of the exact title of a thread that I started and nothing comes up. Some simple word is missing but other unusual words are typed in yet nothing comes up. You'd think the unusual word would trigger a hit but it rarely does.
I've had threads about Classic Auto Air, Borgeson steering box, my engine rebuild of 2022 and numerous other topics that take several word combinations to get them to come up, while other innocuous topics come up with gibberish typed into the box as if it were magic. I have had to scan multiple pages of the specific sub forum to find a thread when the search function failed to find it.
I like to post a link to an old thread to help people through a project that has been thoroughly covered before but it isn't easy.
LOL no Sir, not at all. I am finding it very informative.

Hence my want to bomb. It pertains to my /6 and it's exhaust system.
 
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Search is really useful for seeing what parts have been offered for sale and at what price historically.
Good for what is this part number questions.
Topics like this that have subjective evaluations in them people like to have a fresh say usually
 
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I'm not sure what you mean. Is this a tired topic that annoys you?
If so, I get that.
I've seen members suggest use the search function to find commonly asked topics.
While I do understand that sentiment, the search function here is not good. It friggin pisses me off far more than it helps.
I have typed in what is damned near 100% of the exact title of a thread that I started and nothing comes up. Some simple word is missing but other unusual words are typed in yet nothing comes up. You'd think the unusual word would trigger a hit but it rarely does.
I've had threads about Classic Auto Air, Borgeson steering box, my engine rebuild of 2022 and numerous other topics that take several word combinations to get them to come up, while other innocuous topics come up with gibberish typed into the box as if it were magic. I have had to scan multiple pages of the specific sub forum to find a thread when the search function failed to find it.
I like to post a link to an old thread to help people through a project that has been thoroughly covered before but it isn't easy.
Greg, do your search in Google or favorite search engine and include the term forbbodiesonly in the search and you'll get better results.
 
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