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Flowmaster vs. Magnaflow vs. Borla #994359
05/17/11 06:40 PM 05/17/11 06:40 PM
Joined: Mar 2010
Posts: 20
Salisbury, NC
M
Moparfanatic Offline OP
member
Moparfanatic  Offline OP
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Joined: Mar 2010
Posts: 20
Salisbury, NC
Getting ready to put exhaust on my 70 Roadrunner. Stock 383 with Hooker Super Comps. Will be running 2.5 inch pipe. Wondering about which muffler to use. Want it a little quiet in cabin but louder outside when you step on it. What do you recommend?
Thanks
Re: Flowmaster vs. Magnaflow vs. Borla [Re: Moparfanatic] #994360
05/17/11 07:33 PM 05/17/11 07:33 PM
Joined: Dec 2007
Posts: 646
VA.
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mosweethemi Offline
mopar
mosweethemi  Offline
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Joined: Dec 2007
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VA.
I put Flowmasters on all of my cars , Small blocks 2 1/2 big block 3" Flowmaster 40s I put 3" PIPES ALL THE WAY BACK ON MY 1970 ROAD RUNNER WITH FLOWMASTER 40S ALSO ON MY HEMI CAR . THEY WORK AND MAKE HP!

Re: Flowmaster vs. Magnaflow vs. Borla [Re: Moparfanatic] #994361
05/17/11 07:51 PM 05/17/11 07:51 PM
Joined: Apr 2005
Posts: 15,134
Kelowna, B.C. Canada
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DPelletier Offline
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DPelletier  Offline
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Joined: Apr 2005
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Kelowna, B.C. Canada
Dynomax Ultraflows;

https://board.moparts.org/ubbthreads/upload2/6604983-MufflerComparisionChart.jpg

It's all there in black and white.

Dave

1970 Super Bee 440 Six Pack 1974 'Cuda 2008 Ram 3500 Diesel 2006 Ram 3500 Diesel 2004.5 Ram 2500 Diesel 2003 Ram 3500 Diesel 2006 Durango Limited [url] http://1970superbee.piczo.com [/url]
Re: Flowmaster vs. Magnaflow vs. Borla [Re: Moparfanatic] #994362
05/17/11 08:33 PM 05/17/11 08:33 PM
Joined: Apr 2008
Posts: 212
Mid Michigan
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Coronet-R/T-Rag Offline
enthusiast
Coronet-R/T-Rag  Offline
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Joined: Apr 2008
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Mid Michigan
I just pulled the 50 series delta flow flowmasters off my 440 powered Coronet because they were just to loud! The Flowmaster "drone" at cruise just drove me crazy. I installed Dynomax turbos and LOVE THEM. They are much quiter and flow better as well. Get the turbos, they rock. PS. Get the 20 inchers.
Re: Flowmaster vs. Magnaflow vs. Borla [Re: Coronet-R/T-Rag] #994363
05/17/11 09:02 PM 05/17/11 09:02 PM
Joined: Mar 2005
Posts: 3,138
Central NC
gch Offline
master
gch  Offline
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Central NC
Quote:

I just pulled the 50 series delta flow flowmasters off my 440 powered Coronet because they were just to loud! The Flowmaster "drone" at cruise just drove me crazy. I installed Dynomax turbos and LOVE THEM. They are much quiter and flow better as well. Get the turbos, they rock. PS. Get the 20 inchers.



This with an x-pipe for a little less drone and more growl when you hammer it.

The magnaflow or dynomax ultraflow sound great but are still a bit loud at cruise rpm for me.
The Hooker aero chamber is anothe good option that doesent get a lot of ink.
Re: Flowmaster vs. Magnaflow vs. Borla [Re: gch] #994364
05/17/11 09:06 PM 05/17/11 09:06 PM
Joined: Apr 2008
Posts: 212
Mid Michigan
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Coronet-R/T-Rag Offline
enthusiast
Coronet-R/T-Rag  Offline
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Joined: Apr 2008
Posts: 212
Mid Michigan
Quote:

Quote:

I just pulled the 50 series delta flow flowmasters off my 440 powered Coronet because they were just to loud! The Flowmaster "drone" at cruise just drove me crazy. I installed Dynomax turbos and LOVE THEM. They are much quiter and flow better as well. Get the turbos, they rock. PS. Get the 20 inchers.



This with an x-pipe for a little less drone and more growl when you hammer it.


I forgot the x-pipe. I've got one as well and it did make a big difference. Get one of those too.

The magnaflow or dynomax ultraflow sound great but are still a bit loud at cruise rpm for me.
The Hooker aero chamber is anothe good option that doesent get a lot of ink.


Re: Flowmaster vs. Magnaflow vs. Borla [Re: Moparfanatic] #994365
05/17/11 10:05 PM 05/17/11 10:05 PM
Joined: Oct 2006
Posts: 387
Montreal PQ, Canada
74_360_Cuda Offline
enthusiast
74_360_Cuda  Offline
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Joined: Oct 2006
Posts: 387
Montreal PQ, Canada
I have the Flowmaster Super 40's on my Cuda and I love them but I wanted something loud... Definetly not for you if you don't want too much noise inside your car!
Re: Flowmaster vs. Magnaflow vs. Borla [Re: Coronet-R/T-Rag] #994366
05/17/11 10:09 PM 05/17/11 10:09 PM
Joined: Jul 2005
Posts: 1,472
Overland Park, KS.
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Joshs68 Offline
pro stock
Joshs68  Offline
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Joined: Jul 2005
Posts: 1,472
Overland Park, KS.
Don't trust a muffler you can't see through!
I have Magnaflows on my charger. They sound great I got them from jegs, stainless and cheap. I just replaced the flowaster on my Jeep (don't ask) because I hated the drone and loud crappy sound. Do yourself a favor and don't use one.
Re: Flowmaster vs. Magnaflow vs. Borla [Re: Joshs68] #994367
05/17/11 10:58 PM 05/17/11 10:58 PM
Joined: May 2008
Posts: 238
MS, USA
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killercoronet Offline
enthusiast
killercoronet  Offline
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K

Joined: May 2008
Posts: 238
MS, USA
Dynomax Ultraflows!! I know that isn't one of your choices but i got them on my Coronet with 2.5 exhaust and IMO its the perfect all around exhaust system. But in your choices I'd say Magnaflows they have a real nice sound.
Re: Flowmaster vs. Magnaflow vs. Borla [Re: Moparfanatic] #994368
05/17/11 11:13 PM 05/17/11 11:13 PM
Joined: Jul 2007
Posts: 271
MO, USA
Tom Hand Offline
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Tom Hand  Offline
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Posts: 271
MO, USA
MoparFanatic, use some of these to get the best of all worlds.
Re: Flowmaster vs. Magnaflow vs. Borla [Re: Joshs68] #994369
05/18/11 07:41 AM 05/18/11 07:41 AM
Joined: Jun 2008
Posts: 768
Maryville tn
67coronetman Offline
super stock
67coronetman  Offline
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Joined: Jun 2008
Posts: 768
Maryville tn
Quote:

Don't trust a muffler you can't see through!
I have Magnaflows on my charger. They sound great I got them from jegs, stainless and cheap. I just replaced the flowaster on my Jeep (don't ask) because I hated the drone and loud crappy sound. Do yourself a favor and don't use one.



I do agree flowmaster needs to start over again when Crusing my car there is way to much interior noise you can't even talk to your passenger.!
I have heard the Dynomax super turbo are very nice and the magnaflows where very good.

Old car are me......
Re: Flowmaster vs. Magnaflow vs. Borla [Re: 67coronetman] #994370
05/18/11 08:20 AM 05/18/11 08:20 AM
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383 Offline
Too Many Posts
70Cuda383  Offline
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Posts: 21,345
Marysville, O-H-I-O
my Dakota 5.2L with intake, headers and cam had a magnaflow on it. sounded ok, but it muffled the lope of the cam quite a bit, and droned at cruise RPM.

I'm using some powersticks now, 2 welded together for 60 inches of "muffler" it's not bad at idle, but has some drone at cruise that I need to tune out. I'm going to first, get the exhaust out from under the truck because I just dumped it infront of the rear axle for now. then I'll try putting a short, straight through glass packed muffler to help absorb some of the sound.

I love the sound of the powersticks, especially at WOT as it's pulling through 6,000 rpm. I just need to tone it down a bit to make cruise tolerable!

**Photobucket sucks**
Re: Flowmaster vs. Magnaflow vs. Borla [Re: 70Cuda383] #994371
05/18/11 06:32 PM 05/18/11 06:32 PM
Joined: Dec 2009
Posts: 74
Oregon
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desomod Offline
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desomod  Offline
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Joined: Dec 2009
Posts: 74
Oregon
I am running the Magnaflow's with TTI 2 1/8 headers and 3" on a 528" Hemi. Great sound, no drone at cruise and fantastic at WOT while on the Dyno!!!
Re: Flowmaster vs. Magnaflow vs. Borla [Re: desomod] #994372
05/18/11 08:04 PM 05/18/11 08:04 PM
Joined: Nov 2004
Posts: 948
Alliance, Ohio
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Valiant_Showoff Offline
super stock
Valiant_Showoff  Offline
super stock
V

Joined: Nov 2004
Posts: 948
Alliance, Ohio
Magnaflows for me. Replaced my Flowmasters 5 years ago because I couldn't take the drone anymore. Was painful to drive on the highway. The Flowmasters sounded good outside the car, but I found it really hard to hear the car from the outside when driving it............

I'll never own a Flowmaster again.
Re: Flowmaster vs. Magnaflow vs. Borla [Re: Moparfanatic] #994373
05/18/11 08:26 PM 05/18/11 08:26 PM
Joined: Jan 2003
Posts: 28,067
Irving, TX
feets Offline
Senior Management
feets  Offline
Senior Management

Joined: Jan 2003
Posts: 28,067
Irving, TX
None of them!

I've never met a Flowmaster or Borla that I liked. I can't stand the sound and the drone can be excessive.

We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
Re: Flowmaster vs. Magnaflow vs. Borla [Re: feets] #994374
05/18/11 08:53 PM 05/18/11 08:53 PM
Joined: Apr 2005
Posts: 15,134
Kelowna, B.C. Canada
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DPelletier Offline
I Live Here
DPelletier  Offline
I Live Here
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Joined: Apr 2005
Posts: 15,134
Kelowna, B.C. Canada
FWIW,

2 1/2" mufflers tested at 15" WC;

- Flowmaster 249 CFM
- Magnaflow 284 CFM
- Borla 373 CFM

Straight 2 1/4" pipe - 365 CFM
Straight 2 1/2" pipe - 521 CFM

.....Dynomax Ultraflow - 512CFM.....AND it's significantly quieter than the Flowmasters.


Dave

1970 Super Bee 440 Six Pack 1974 'Cuda 2008 Ram 3500 Diesel 2006 Ram 3500 Diesel 2004.5 Ram 2500 Diesel 2003 Ram 3500 Diesel 2006 Durango Limited [url] http://1970superbee.piczo.com [/url]
Re: Flowmaster vs. Magnaflow vs. Borla [Re: DPelletier] #994375
05/18/11 10:08 PM 05/18/11 10:08 PM
Joined: Jul 2003
Posts: 3,374
Rancho Cordova, CA
Exit1965 Offline
master
Exit1965  Offline
master

Joined: Jul 2003
Posts: 3,374
Rancho Cordova, CA
Seriously? How can a Dynomax ultra-flow flow nearly 2x a magnaflow, they are both straight through mufflers with packing material around the perforated pipe.

I have Magnaflow stainless, with an X pipe. Switched to them from Flowtech afterburners ("Summit welded muffler"). There is no more drone inside and it sounds great, certainly not quiet either.
Re: Flowmaster vs. Magnaflow vs. Borla [Re: Exit1965] #994376
05/18/11 10:15 PM 05/18/11 10:15 PM
Joined: Jul 2003
Posts: 3,374
Rancho Cordova, CA
Exit1965 Offline
master
Exit1965  Offline
master

Joined: Jul 2003
Posts: 3,374
Rancho Cordova, CA
Found this on another board, lots of numbers here. Within a few HP/torque I think would be considered basically equivalent.
Re: Flowmaster vs. Magnaflow vs. Borla [Re: Exit1965] #994377
05/18/11 10:29 PM 05/18/11 10:29 PM
Joined: Mar 2005
Posts: 1,546
Michigan
K
Kiddart Offline
pro stock
Kiddart  Offline
pro stock
K

Joined: Mar 2005
Posts: 1,546
Michigan
3 inch Dynomax for ever

Thank you
Kiddart
Re: Flowmaster vs. Magnaflow vs. Borla [Re: Exit1965] #994378
05/18/11 11:54 PM 05/18/11 11:54 PM
Joined: Apr 2005
Posts: 15,134
Kelowna, B.C. Canada
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DPelletier Offline
I Live Here
DPelletier  Offline
I Live Here
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Joined: Apr 2005
Posts: 15,134
Kelowna, B.C. Canada
Quote:

Seriously? How can a Dynomax ultra-flow flow nearly 2x a magnaflow, they are both straight through mufflers with packing material around the perforated pipe.

I have Magnaflow stainless, with an X pipe. Switched to them from Flowtech afterburners ("Summit welded muffler"). There is no more drone inside and it sounds great, certainly not quiet either.



I dunno; perhaps there are more than one design of Magnaflows? not my data.

All I DO know is that I'd never use a Flowmaster when the Ultraflows flow twice as well AND are quieter.

Dave

1970 Super Bee 440 Six Pack 1974 'Cuda 2008 Ram 3500 Diesel 2006 Ram 3500 Diesel 2004.5 Ram 2500 Diesel 2003 Ram 3500 Diesel 2006 Durango Limited [url] http://1970superbee.piczo.com [/url]
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