Muffler opinion Wanted: 50 series Flowmaster or Dynomax? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jorgensensc · 08-08-2007, 07:21 PM

I can get a great deal on my choice of either brand new 50 series Flowmaster that are 2 years old on a camaro that was a toy, or brand new Dynomax mufflers that were never run, either for the same price. What would you choose and why? I listened to sound clips of both, but can't really decide, They both sound good. The truck has a 350 in it with true dual exhaust. Looking for opinions!
As always, Thanks!!
Shawn

cdowns · 08-08-2007, 07:28 PM

anything but a blowmaster

HavinSomeFun · 08-08-2007, 10:04 PM

I have ran both in the past and currently have the 50 series behind my decently built 400 small block. They dump before the rear end. I think the performance is OK with them. However, I still think they are 2 quiet. I also know the dyno's are having problems with the welds the past several months. As far as performance, go with the 40 series flowmasters and you will be happy. IMO of course

jorgensensc · 08-09-2007, 10:57 AM

THanks for the opinions so far. 40 series are unfortunately out of the question as my truck is on my driveway and next to my neighbors bedroom windows at night. I leave about 5:00 A.M. for work, so starting up the truck with 40 series may not be a great idea.

I'm kinda leaning towards the dynomax only because a member has them on a truck here and they seem to sound good. The 50 series may be a litttle too quiet as was stated before. Anymore opinions? I'm going to get them from the guy in about 15 min.
Shawn

jorgensensc · 08-09-2007, 10:59 AM

Sound clip of members truck with dynomax installed:
http://youtube.com/watch?v=Ziw6lCGYWa0
Shawn

matthufham · 08-09-2007, 12:32 PM

those are the dynomax bullets, they're the loudest mufflers made. i have 2 of those, 3 inch version on my truck, louder than glasspacks, loudest thing i've heard other than my truck without any mufflers.

if you want quiet, use the flowmasters. if the dynomax mufflers you're getting are different from the ones in the videoclip than i'm not sure how loud they are, but the bullets are the loudest

lilred67 · 08-09-2007, 12:45 PM

i run dynomax ultra flows on my '97 gmc and really like them. i 'm also going to put the ultra flows on my '67 after the v-8 swap.
they have a good sound and are not real loud until you hit the skinny pedal pretty hard. imo

timcos · 08-09-2007, 01:13 PM

I see this question a lot...and it seems like there is no real answer...unfortunatley what ever you pick...it is your till you pay for replacement.

I would like the openness of a good muffler - read good breathability - but I do not want to hear the muffler...I like hearing my stereo more.

After twelve years on submarines my hearing is a bit diminished.

What? What? HUH?

bryanw1968 · 08-09-2007, 01:29 PM

Quote:

Originally Posted by cdowns

anything but a blowmaster

DYNOMAX!!!!!!!!!!!!!

Done with flows......I gained a noticeable amount of power when I switched.

bryanw1968 · 08-09-2007, 01:36 PM

Quote:

Originally Posted by matthufham

those are the dynomax bullets, they're the loudest mufflers made. i have 2 of those, 3 inch version on my truck, louder than glasspacks, loudest thing i've heard other than my truck without any mufflers.

if you want quiet, use the flowmasters. if the dynomax mufflers you're getting are different from the ones in the videoclip than i'm not sure how loud they are, but the bullets are the loudest

These aren't bullets. They're the Dynomax Welded Race Mufflers. They look just like a flowmaster but are straight through. So, yah the flow is the same but there is stainless steel packing around the pass tube which makes them not so "glass pack" sounding.

jorgensensc · 08-09-2007, 03:15 PM

THanks everyone!! I pulled the trigger and got the Dynomax Mufflers. They are called Magnum Race mufflers. Got both brand new 3" in and out for 60.00. Now to get reducers to fit the exhaust I already have! They look like a straight through design with packing on the sides. Thanks to everyone here for the opinions and help!
Shawn

jorgensensc · 08-09-2007, 03:39 PM

After researching further it seems the Welded race Magnums became the Ultra Flow Welded race Mufflers. Bryan that was the sound i was going for!! Lucky me! BTW, what engine with what mods do you have? To bad I tore my engine apart yesterday to clean it up!
Shawn

bryanw1968 · 08-10-2007, 09:40 AM

SBC 355
TrickFlow Kenny Duutweiler aluminum heads
Comp Cams Extreme Energy 268
Edelbrock RPM intake
Demon 650 DP carb
MSD 6AL ingnition w/pro billet dist
Hedman headers w/Dynomax welded race muffs 2 1/2" with H pipe

msgross · 08-10-2007, 09:55 AM

does the guy want to sell the flowmasters cheap? if so let me know..

Texasdeere · 08-10-2007, 10:20 AM

Just wanted to say that 50 series flows are not that quiet. They are about as loud as turbo mufflers with a different sound of course. With a stock engine and manifolds they are fairly quiet, with headers and a cam thay are a bit more noticable.

08-08-2007, 07:21 PM	#1
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Muffler opinion Wanted: 50 series Flowmaster or Dynomax? I can get a great deal on my choice of either brand new 50 series Flowmaster that are 2 years old on a camaro that was a toy, or brand new Dynomax mufflers that were never run, either for the same price. What would you choose and why? I listened to sound clips of both, but can't really decide, They both sound good. The truck has a 350 in it with true dual exhaust. Looking for opinions! As always, Thanks!! Shawn __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE Last edited by jorgensensc; 08-08-2007 at 07:22 PM.

08-08-2007, 07:28 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Muffler opinion Wanted: 50 series Flowmaster or Dynomax? anything but a blowmaster __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

08-08-2007, 10:04 PM	#3
HavinSomeFun Still Just Havin Some Fun! Join Date: Jun 2007 Location: Piedmont, Oklahoma Posts: 1,145	Re: Muffler opinion Wanted: 50 series Flowmaster or Dynomax? I have ran both in the past and currently have the 50 series behind my decently built 400 small block. They dump before the rear end. I think the performance is OK with them. However, I still think they are 2 quiet. I also know the dyno's are having problems with the welds the past several months. As far as performance, go with the 40 series flowmasters and you will be happy. IMO of course __________________ a green one with some stuff done to it....

08-09-2007, 10:57 AM	#4
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: Muffler opinion Wanted: 50 series Flowmaster or Dynomax? THanks for the opinions so far. 40 series are unfortunately out of the question as my truck is on my driveway and next to my neighbors bedroom windows at night. I leave about 5:00 A.M. for work, so starting up the truck with 40 series may not be a great idea. I'm kinda leaning towards the dynomax only because a member has them on a truck here and they seem to sound good. The 50 series may be a litttle too quiet as was stated before. Anymore opinions? I'm going to get them from the guy in about 15 min. Shawn __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

08-09-2007, 10:59 AM	#5
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: Muffler opinion Wanted: 50 series Flowmaster or Dynomax? Sound clip of members truck with dynomax installed: http://youtube.com/watch?v=Ziw6lCGYWa0 Shawn __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

08-09-2007, 12:32 PM	#6
matthufham Registered User Join Date: Feb 2005 Location: Carl Junction, Missouri Posts: 2,061	Re: Muffler opinion Wanted: 50 series Flowmaster or Dynomax? those are the dynomax bullets, they're the loudest mufflers made. i have 2 of those, 3 inch version on my truck, louder than glasspacks, loudest thing i've heard other than my truck without any mufflers. if you want quiet, use the flowmasters. if the dynomax mufflers you're getting are different from the ones in the videoclip than i'm not sure how loud they are, but the bullets are the loudest Last edited by matthufham; 08-09-2007 at 12:32 PM.

08-09-2007, 12:45 PM	#7
lilred67 Senior Member Join Date: Mar 2005 Location: weatherford,texas Posts: 1,003	Re: Muffler opinion Wanted: 50 series Flowmaster or Dynomax? i run dynomax ultra flows on my '97 gmc and really like them. i 'm also going to put the ultra flows on my '67 after the v-8 swap. they have a good sound and are not real loud until you hit the skinny pedal pretty hard. imo

08-09-2007, 01:13 PM	#8
timcos Chief Honcho In Charge Join Date: Aug 2006 Location: Bentonville AR Posts: 970	Re: Muffler opinion Wanted: 50 series Flowmaster or Dynomax? I see this question a lot...and it seems like there is no real answer...unfortunatley what ever you pick...it is your till you pay for replacement. I would like the openness of a good muffler - read good breathability - but I do not want to hear the muffler...I like hearing my stereo more. After twelve years on submarines my hearing is a bit diminished. What? What? HUH? __________________ 1992 1500 4x4 Shortbed 1984 Ford F250 Supercab Longbed 6.9L Diesel 1972 K10 Cheyenne Super Fleetside Short Bed - 350 - A/C 1971 VW SuperBeetle 1960 Wife 1984 Son 1986 Son 1989 Son Previous Trucks 1967 C10 SWB (1980-1981) 1971 C10 LWB (1998-2004)

08-09-2007, 03:15 PM	#11
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: Muffler opinion Wanted: 50 series Flowmaster or Dynomax? THanks everyone!! I pulled the trigger and got the Dynomax Mufflers. They are called Magnum Race mufflers. Got both brand new 3" in and out for 60.00. Now to get reducers to fit the exhaust I already have! They look like a straight through design with packing on the sides. Thanks to everyone here for the opinions and help! Shawn __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

08-09-2007, 03:39 PM	#12
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: Muffler opinion Wanted: 50 series Flowmaster or Dynomax? After researching further it seems the Welded race Magnums became the Ultra Flow Welded race Mufflers. Bryan that was the sound i was going for!! Lucky me! BTW, what engine with what mods do you have? To bad I tore my engine apart yesterday to clean it up! Shawn __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

08-10-2007, 09:40 AM	#13
bryanw1968 Senior Member Join Date: Jul 2006 Location: Leander, Texas Posts: 850	Re: Muffler opinion Wanted: 50 series Flowmaster or Dynomax? SBC 355 TrickFlow Kenny Duutweiler aluminum heads Comp Cams Extreme Energy 268 Edelbrock RPM intake Demon 650 DP carb MSD 6AL ingnition w/pro billet dist Hedman headers w/Dynomax welded race muffs 2 1/2" with H pipe Attached Images

08-10-2007, 09:55 AM	#14
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: Muffler opinion Wanted: 50 series Flowmaster or Dynomax? does the guy want to sell the flowmasters cheap? if so let me know.. __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

08-10-2007, 10:20 AM	#15
Texasdeere Registered User Join Date: Sep 2006 Location: League City, Texas Posts: 732	Re: Muffler opinion Wanted: 50 series Flowmaster or Dynomax? Just wanted to say that 50 series flows are not that quiet. They are about as loud as turbo mufflers with a different sound of course. With a stock engine and manifolds they are fairly quiet, with headers and a cam thay are a bit more noticable.



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