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Which Flowmaster is the best application #2585113
11/30/18 12:13 PM
11/30/18 12:13 PM
Joined: Oct 2004
Posts: 702
Oklahoma
G
gregok Offline OP
super stock
gregok  Offline OP
super stock
G

Joined: Oct 2004
Posts: 702
Oklahoma
I’m ready to purchase Flowmaster mufflers for my 70 Cuda 440+6 and was looking for some input as to which of the following you have had experience with: 40 series, super 40 series or the 44 series.

Re: Which Flowmaster is the best application [Re: gregok] #2585205
11/30/18 03:05 PM
11/30/18 03:05 PM
Joined: Sep 2003
Posts: 19,239
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
"Butt Crack Bob"

Joined: Sep 2003
Posts: 19,239
north of coder
straight pipes [saves lives ya know] biggrin [JK]
beer

Re: Which Flowmaster is the best application [Re: gregok] #2585276
11/30/18 05:39 PM
11/30/18 05:39 PM
Joined: Dec 2011
Posts: 892
MA
steve70 Offline
super stock
steve70  Offline
super stock

Joined: Dec 2011
Posts: 892
MA
Buy the reproduction factory mufflers, they sound better.


1970 Challenger T/A 4 speed
Re: Which Flowmaster is the best application [Re: gregok] #2585437
11/30/18 11:30 PM
11/30/18 11:30 PM
Joined: Nov 2004
Posts: 16,450
On the run…
BloFish Offline
I Live Here
BloFish  Offline
I Live Here

Joined: Nov 2004
Posts: 16,450
On the run…
Agreed


It really doesn't matter whether you win or lose…
as long as you look good doing it!

‘65 A100
‘69 ‘Cuda
‘73 Vega GT
‘06 Mega Cab
‘14 Mercedes SLK
Re: Which Flowmaster is the best application [Re: gregok] #2585444
11/30/18 11:43 PM
11/30/18 11:43 PM
Joined: Jan 2003
Posts: 21,474
N.E. OHIO, USA
A12 Offline
Too Many Posts
A12  Offline
Too Many Posts

Joined: Jan 2003
Posts: 21,474
N.E. OHIO, USA
Have the Flowmaster 40 series on my GTX and can't stand the resonance at any cruising speed and my wife rarely wants to get in the car for anything but a very short trip. She says it gives her a headache and liked the Dynomax stainless Ultra Flo mufflers on the '68 Road Runner much, much better. Me too hands down. The Dynomax mufflers are the same design as the stock OEM mufflers and they sound to me exactly as I remember what the mufflers on my new in '69 Road Runner sounded like in 1969......I'm old but that's what I remember them sounding like for the 11 years of ownership. First time I drove the GTX with the Flowmaster's I stopped the car to see if there was a problem with the mufflers like a loose clamp or something. Bought a new set of Dynomax ultra flo's and can't wait to put them on....the Flowmaster resonance is painful some times.


My Road Runner circa summer 1969

My_69_road_runner_circa_1969_006.jpg
Re: Which Flowmaster is the best application [Re: gregok] #2585575
12/01/18 11:03 AM
12/01/18 11:03 AM
Joined: Jan 2003
Posts: 2,757
Gilbertsville, PA 19525
P
Pntastar69 Offline
master
Pntastar69  Offline
master
P

Joined: Jan 2003
Posts: 2,757
Gilbertsville, PA 19525
Can you say "drone"???

Re: Which Flowmaster is the best application [Re: A12] #2585643
12/01/18 02:09 PM
12/01/18 02:09 PM
Joined: Oct 2004
Posts: 702
Oklahoma
G
gregok Offline OP
super stock
gregok  Offline OP
super stock
G

Joined: Oct 2004
Posts: 702
Oklahoma
I got on the Dynomax website and did not see any Mopar applications, only Ford and GM. Tell me what Dynomax muffler you put on your Road Runner. Do you have a 2 1/2 inlet and 2 1/4 outlet?

Re: Which Flowmaster is the best application [Re: gregok] #2585732
12/01/18 05:02 PM
12/01/18 05:02 PM
Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
Silver70 Offline
I Live Here
Silver70  Offline
I Live Here

Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
I put a pair of the stainless flowmaster fx on my 5.7 magnum... not loud, but they sound good. Probably would be louder on a car without cats.


68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram
Re: Which Flowmaster is the best application [Re: gregok] #2585792
12/01/18 07:28 PM
12/01/18 07:28 PM
Joined: Jan 2003
Posts: 21,474
N.E. OHIO, USA
A12 Offline
Too Many Posts
A12  Offline
Too Many Posts

Joined: Jan 2003
Posts: 21,474
N.E. OHIO, USA
Correction on the inlet and outlet positions; Offset in/Center OUT

Originally Posted By gregok
I got on the Dynomax website and did not see any Mopar applications, only Ford and GM. Tell me what Dynomax muffler you put on your Road Runner. Do you have a 2 1/2 inlet and 2 1/4 outlet?


The mufflers I have are 2-1/2" offset in and 2-1/2" center out.

The Dynomax official site shows it as center in and out which is incorrect. Every other site shows it as offset in and center out both with 2-1/2" diameter. Part number 17289

Found this just now on the Advance Auto parts site for $195.99

Dynomax Ultra Flo SS Universal Muffler part # 17289




This is one of the box labels on the mufflers I have (dimensions are on the label in inches):

Mike



20181201_160905_resized.jpg
Last edited by A12; 12/01/18 07:38 PM.
Re: Which Flowmaster is the best application [Re: A12] #2585834
12/01/18 09:30 PM
12/01/18 09:30 PM
Joined: Jan 2003
Posts: 9,436
Blair County,PA
62maxwgn Offline
master
62maxwgn  Offline
master

Joined: Jan 2003
Posts: 9,436
Blair County,PA
Originally Posted By A12
Correction on the inlet and outlet positions; Offset in/Center OUT

Originally Posted By gregok
I got on the Dynomax website and did not see any Mopar applications, only Ford and GM. Tell me what Dynomax muffler you put on your Road Runner. Do you have a 2 1/2 inlet and 2 1/4 outlet?


The mufflers I have are 2-1/2" offset in and 2-1/2" center out.

The Dynomax official site shows it as center in and out which is incorrect. Every other site shows it as offset in and center out both with 2-1/2" diameter. Part number 17289

Found this just now on the Advance Auto parts site for $195.99

Dynomax Ultra Flo SS Universal Muffler part # 17289




This is one of the box labels on the mufflers I have (dimensions are on the label in inches):

Mike



Mike,illustration is wrong,description is correct.Also if tailpipes are correct they would be 2 1/4" same as B-body so that means a tail pipe change with this muffler


17289
ULTRA FLO™ STAINLESS STEEL POLISHED - OFFSET / CENTERED
Muffler Configuration: Offset/Centered
Inlet / Outlet Diameter: 2.5"

And on aside note,personally I wouldn't put a Flow Master on my John Deere,but that's just me ! stirthepot grin

Re: Which Flowmaster is the best application [Re: 62maxwgn] #2585876
12/01/18 11:13 PM
12/01/18 11:13 PM
Joined: Jan 2003
Posts: 21,474
N.E. OHIO, USA
A12 Offline
Too Many Posts
A12  Offline
Too Many Posts

Joined: Jan 2003
Posts: 21,474
N.E. OHIO, USA
Thanks Bill, as always you're on it. I never considered the stock pipe size for my rr or gtx and always intended to run 2.5" pipes in and out. Are O.E. pipes 2.5" in and 2.25" out or 2.25" in and out?

Thanks Bill


Mike

Re: Which Flowmaster is the best application [Re: A12] #2585898
12/02/18 12:11 AM
12/02/18 12:11 AM
Joined: Jan 2003
Posts: 9,436
Blair County,PA
62maxwgn Offline
master
62maxwgn  Offline
master

Joined: Jan 2003
Posts: 9,436
Blair County,PA
This,

O.E. pipes 2.5" in and 2.25" out

Re: Which Flowmaster is the best application [Re: gregok] #2585922
12/02/18 01:11 AM
12/02/18 01:11 AM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,007
Bend,OR USA
Flow stoppers are a big NO NO if you want the most performance from your ride tsk twocents
Buy a set like in the one post showing the perforated pipe coming in on the side and going straight through the muff to the outlet in the center up scope That design has the least restriction up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Which Flowmaster is the best application [Re: 62maxwgn] #2585924
12/02/18 01:19 AM
12/02/18 01:19 AM
Joined: Jan 2003
Posts: 21,474
N.E. OHIO, USA
A12 Offline
Too Many Posts
A12  Offline
Too Many Posts

Joined: Jan 2003
Posts: 21,474
N.E. OHIO, USA
Quote:
And on aside note,personally I wouldn't put a Flow Master on my John Deere,but that's just me ! stirthepot grin


Yeah Bill that JD of yours is way too nice to do that up

Re: Which Flowmaster is the best application [Re: gregok] #2585958
12/02/18 02:40 AM
12/02/18 02:40 AM
Joined: May 2015
Posts: 1,134
Lost in Time
Iowan Offline
super stock
Iowan  Offline
super stock

Joined: May 2015
Posts: 1,134
Lost in Time
If your going to drive the car less than 300 miles a year it doesn't matter but I've used the 40 and 44s the drone sucks.


Have a great day
Iowan

"obsolete is neat"

Re: Which Flowmaster is the best application [Re: gregok] #2586054
12/02/18 12:04 PM
12/02/18 12:04 PM
Joined: Jul 2003
Posts: 4,741
Holland MI Ottawa
2
2boltmain Offline
master
2boltmain  Offline
master
2

Joined: Jul 2003
Posts: 4,741
Holland MI Ottawa
In 1994 I was 24 years old. Put 50 series FMs on my 440 Challenger. Holy crap I hated it. Friends loved the sound but my killer stereo had to be cranked up LOUD just to hear inside the car. A lower HP car with OEM exh manifolds will not be so crazy loud but Powerful a engine with headers...Flowmasters are an eardrum cracker.


Keep old mopars alive.
Re: Which Flowmaster is the best application [Re: gregok] #2586175
12/02/18 04:11 PM
12/02/18 04:11 PM
Joined: Jun 2008
Posts: 3,913
usa
L
lewtot184 Offline
master
lewtot184  Offline
master
L

Joined: Jun 2008
Posts: 3,913
usa
dynomax!

Re: Which Flowmaster is the best application [Re: gregok] #2586305
12/02/18 09:09 PM
12/02/18 09:09 PM
Joined: May 2015
Posts: 1,134
Lost in Time
Iowan Offline
super stock
Iowan  Offline
super stock

Joined: May 2015
Posts: 1,134
Lost in Time
Come to think of it I put a 50 on my 05 four half ton Dodge pickup and that sucked.


Have a great day
Iowan

"obsolete is neat"

Re: Which Flowmaster is the best application [Re: gregok] #2586403
12/03/18 12:14 AM
12/03/18 12:14 AM
Joined: Jan 2003
Posts: 1,800
North Dakota
Azzkikrcuda Offline
top fuel
Azzkikrcuda  Offline
top fuel

Joined: Jan 2003
Posts: 1,800
North Dakota
Love the Original 40 Series on my car. Loud and Proud


The only Carbs I care about are under the hood!
Re: Which Flowmaster is the best application [Re: gregok] #2586580
12/03/18 01:38 PM
12/03/18 01:38 PM
Joined: Feb 2014
Posts: 1,695
central il.
S
second 70 Offline
top fuel
second 70  Offline
top fuel
S

Joined: Feb 2014
Posts: 1,695
central il.
I run 3" super 40's on my hemi and love them.

IMG_1249.JPG
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