Dynomax ultra flow stainless steel muffler... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bryanw1968 · 11-30-2009, 03:33 PM

Anybody on the board running a set of these? I just bought a pair and will be installing them soon. Jegs has them listed at $107 each but I found some on ebay for $78 that are supposedly a direct fit for a new gmc/chevy and they are round instead of the normal style.

I am currently running Dynomax ultra flow race mufflers and after several years they have gotten too loud.

Check it out....
http://cgi.ebay.com/ebaymotors/ws/eB...AQ:MOTORS:1123

bryanw1968 · 12-01-2009, 09:40 PM

So I did some more research. Being that it is a straight through muffler it will sound the same as what I'm currently running(dynomax welded race).

Still looking for a semi-quieter high flowing alternative. Anyone.....Anyone?
:-)

POPO1984 · 12-01-2009, 11:21 PM

24 inch magnaflow

**SactoJim** · 12-02-2009, 12:05 AM

I have the regular Ultra Flows on mine. Nice sound at idle and cruising around, but pretty loud when you get on it and in my opinion, a little "glass pack" sounding when you are on it.

bryanw1968 · 12-02-2009, 09:36 AM

Yah I love the way mine sounds at idle but they have become a little "glass packy" like you said ;-)

wzuke · 12-03-2009, 02:05 AM

I have Dynomax mufflers, they sound a lot like a farm tractor!!

Shon · 12-03-2009, 10:20 AM

I am running 22" magnaflows. its quiet!

suprachrgd82 · 12-03-2009, 01:36 PM

I have always been a fan of turbo mufflers. They are relatively quiet, deep but not offensive. Much more refined than Flowmasters or chambered mufflers.

They flow much better than stock, but not so much that you lose your low end torque.

Turbo mufflers are inexpensive ($20-40) and come in all sizes. Check out Summit for Thrush mufflers.

evilways · 12-03-2009, 06:37 PM

Mine numb my brain at that spot when they are at the low tone, also could be because I dumped them under the cab too, I ran out of funds for that day. I kind of liked my cherry bombs better, but that could be the hillbilly in me liking the ole farm truck cackle.

POPO1984 · 12-03-2009, 06:58 PM

I am thinking of running the thrush exhaust kit on my truck. You can get the whole kit cheap for less than 300 with mufflers. pretty good for mandrel bent pipe

jholley · 12-03-2009, 09:51 PM

Quote:

Originally Posted by POPO1984

24 inch magnaflow

I'll second the magnaflows. Pretty tame at idle and don't really rumble and roar like flows when your in it. Where in Central Texas are you? I'm in Waco if you want to come over an listen to mine before you commit.

'72customdeluxe · 12-04-2009, 02:44 AM

Quote:

Originally Posted by bryanw1968

So I did some more research. Being that it is a straight through muffler it will sound the same as what I'm currently running(dynomax welded race).

Still looking for a semi-quieter high flowing alternative. Anyone.....Anyone?
:-)

Naw, they have alot more packing volume. Alot quieter than bullets. They do "open up" at higher throttle levels because they are straight through. When the velocity goes up it can't really muffle. They're about the same as Magnaflows. We had an ultra flo si/si catback on an '03 Ram 4.7 (loud truck in general) and it was pretty mellow. Very good tone. If it sounds glass-packy you might want to add an h or x pipe, which I think everyone should have anyway.

AustinScott · 12-04-2009, 10:38 PM

SPINTECH!
sound good less filling!

Arad68 · 12-05-2009, 02:57 AM

24" Magnaflows

bryanw1968 · 12-05-2009, 11:50 AM

Thanks for all the responses. Don't get me wrong I love that "farm truck crackle" too. One good thing about being broke is that I have a lot of time to look/save :-) So one question on the magnaflows......a lot of people seem to like them. Do they eventually get louder as the packing blows out?
Thanks!

'72customdeluxe · 12-05-2009, 12:57 PM

The sound doesn't change much for a loooong time. They have stainless steel wool wrapped around the core before the packing I think.

11-30-2009, 03:33 PM	#1
bryanw1968 Senior Member Join Date: Jul 2006 Location: Leander, Texas Posts: 850	Dynomax ultra flow stainless steel muffler... Anybody on the board running a set of these? I just bought a pair and will be installing them soon. Jegs has them listed at $107 each but I found some on ebay for $78 that are supposedly a direct fit for a new gmc/chevy and they are round instead of the normal style. I am currently running Dynomax ultra flow race mufflers and after several years they have gotten too loud. Check it out.... http://cgi.ebay.com/ebaymotors/ws/eB...AQ:MOTORS:1123

12-01-2009, 09:40 PM	#2
bryanw1968 Senior Member Join Date: Jul 2006 Location: Leander, Texas Posts: 850	Re: Dynomax ultra flow stainless steel muffler... So I did some more research. Being that it is a straight through muffler it will sound the same as what I'm currently running(dynomax welded race). Still looking for a semi-quieter high flowing alternative. Anyone.....Anyone? :-) Last edited by bryanw1968; 12-01-2009 at 09:41 PM.

12-01-2009, 11:21 PM	#3
POPO1984 Registered User Join Date: Jul 2009 Location: Houston, Tx Posts: 1,133	Re: Dynomax ultra flow stainless steel muffler... 24 inch magnaflow __________________ 1972 SWB Medium Olive South Houston Instagram: Antbish84

12-02-2009, 12:05 AM	#4
SactoJim Registered User Join Date: Oct 2005 Location: Sacramento, CA Posts: 1,970	Re: Dynomax ultra flow stainless steel muffler... I have the regular Ultra Flows on mine. Nice sound at idle and cruising around, but pretty loud when you get on it and in my opinion, a little "glass pack" sounding when you are on it. __________________ 72 Cheyenne SWB Fleet Nut & bolt frame off in progress...99.9999% - supercharged 383 - 4 wheel discs - relocated fuel tank - My Build Thread

12-02-2009, 09:36 AM	#5
bryanw1968 Senior Member Join Date: Jul 2006 Location: Leander, Texas Posts: 850	Re: Dynomax ultra flow stainless steel muffler... Yah I love the way mine sounds at idle but they have become a little "glass packy" like you said ;-)

12-03-2009, 02:05 AM	#6
wzuke Registered User Join Date: Nov 2007 Location: Marion, IL Posts: 112	Re: Dynomax ultra flow stainless steel muffler... I have Dynomax mufflers, they sound a lot like a farm tractor!!

12-03-2009, 10:20 AM	#7
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: Dynomax ultra flow stainless steel muffler... I am running 22" magnaflows. its quiet! __________________ 71 Cheyenne C10 LWB cam'd 6.0/T56 Swap

12-03-2009, 01:36 PM	#8
suprachrgd82 Farmtruck desciple Join Date: May 2009 Location: 90605 Posts: 158	Re: Dynomax ultra flow stainless steel muffler... I have always been a fan of turbo mufflers. They are relatively quiet, deep but not offensive. Much more refined than Flowmasters or chambered mufflers. They flow much better than stock, but not so much that you lose your low end torque. Turbo mufflers are inexpensive ($20-40) and come in all sizes. Check out Summit for Thrush mufflers.

12-03-2009, 06:37 PM	#9
evilways Registered User Join Date: Mar 2008 Location: Lafayette, IN Posts: 226	Re: Dynomax ultra flow stainless steel muffler... Mine numb my brain at that spot when they are at the low tone, also could be because I dumped them under the cab too, I ran out of funds for that day. I kind of liked my cherry bombs better, but that could be the hillbilly in me liking the ole farm truck cackle. __________________ Mark 1967 C/10 stepside lwb daily driver 1968 C/10 fleetside lwb parts truck 1971 Cheyenne Super swb project

12-03-2009, 06:58 PM	#10
POPO1984 Registered User Join Date: Jul 2009 Location: Houston, Tx Posts: 1,133	Re: Dynomax ultra flow stainless steel muffler... I am thinking of running the thrush exhaust kit on my truck. You can get the whole kit cheap for less than 300 with mufflers. pretty good for mandrel bent pipe __________________ 1972 SWB Medium Olive South Houston Instagram: Antbish84

12-04-2009, 10:38 PM	#13
AustinScott Registered User Join Date: Dec 2007 Location: Southington CT Posts: 548	Re: Dynomax ultra flow stainless steel muffler... SPINTECH! sound good less filling!

12-05-2009, 02:57 AM	#14
Arad68 Trucks N Tranzams Join Date: Dec 2002 Location: North Las Vegas, Nevada Posts: 816	Re: Dynomax ultra flow stainless steel muffler... 24" Magnaflows __________________ Don '68 Chevy LB 383 TH400/GV/373 posi '56 Chevy 4WD SWB '64 Chevy short stepside '79 Trans Am 455/TH2004R/12blt/4whldisc 95 Kia (Wifes car) 2002 S-10 extended cab pickup "God punishes small sins immediately"

12-05-2009, 11:50 AM	#15
bryanw1968 Senior Member Join Date: Jul 2006 Location: Leander, Texas Posts: 850	Re: Dynomax ultra flow stainless steel muffler... Thanks for all the responses. Don't get me wrong I love that "farm truck crackle" too. One good thing about being broke is that I have a lot of time to look/save :-) So one question on the magnaflows......a lot of people seem to like them. Do they eventually get louder as the packing blows out? Thanks!

12-05-2009, 12:57 PM	#16
'72customdeluxe Registered User Join Date: Jan 2008 Location: Tejas Posts: 691	Re: Dynomax ultra flow stainless steel muffler... The sound doesn't change much for a loooong time. They have stainless steel wool wrapped around the core before the packing I think. __________________ '72 cheyenne super step, '05 long bed gmc

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