Flowmaster Mufflers 40 Series Delta Flow

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Center Inlet / Center Outlet
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Center Inlet / Dual Outlet
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Center Inlet / Offset Outlet
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Offset Inlet / Center Outlet
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Offset Inlet / Dual Outlet
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Offset Inlet / Opposite Side Offset Outlet
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Offset Inlet / Same Side Offset Outlet
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Features

  • The Flowmaster 40 Series Delta Flow Muffler boasts famous Flowmaster power and torque with a milder tone and reduced interior resonance
  • The ideal muffler for late-model performance cars and dual-exhaust cruisers
  • Quality Flowmaster muffler crafting uses aluminized steel for corrosion resistance and precise mig welds for maximum durability
  • The Flowmaster 40 Series Delta Flow Muffler utilizes Delta Flow deflector technology for noise reduction and superior exhaust scavenging
  • Original two-chamber design maximizes horsepower and torque
  • Casing embossed with the Flowmaster name
  • Your Flowmaster 40 Series Delta Flow Muffler carries a 3-year warranty

Description

All the power and performance of Flowmaster’s muscular mufflers without the roaring interior resonance—that’s the idea behind their 40 Series Delta Flow Muffler. It’s the ideal pick for late-model performance cars that want powerful exterior tone while enjoying a quieter ride.

At the heart of the 2-chamber design is Flowmaster’s exclusive Delta Flow technology. This innovative engineering utilizes precision-placed deflectors that not only mute interior sound, they fuel increased exhaust scavenging for the most possible power.

Also ideal for dual exhaust cruisers, the Flowmaster 40 Series Delta Flow Muffler boasts the quality construction you’d expect from Flowmaster. Each Flowmaster Muffler is built with 16-gauge aluminized steel for corrosion resistance and fully mig-welded for maximum durability. Best yet, your Flowmaster 40 Series Delta Flow Muffler boasts a 3-year warranty.

Notes

  • Flowmaster 40 Series Delta Flow Mufflers come in a variety of inlet/outlet configurations and sizes, shown above. Select the inlet/outlet diameter you need from the drop down at right.
  • Select 40 Series Delta Flow model configurations are available with T-409 stainless steel construction instead of aluminized steel for extending protection against corrosion and yellowing.

Average Customer Rating

  (38)
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FloW 40 Delta

Posted on 07/31/2007 by Megan C. - 2004 Chevy Blazer (Jupiter,FL)

4 of 4 people found the following review helpful.

"This muffler is off the chain..i installed it on my 2004 Chevrolet Blazer 4.3 V6..it sounds like a V8 in idle and peak power is anywhere from 1500RPMs to 2300RPMs..its a great Muffler!!! i would recomend it to anyone with a blazer.."

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About Megan C.
Vehicle
2004 Chevy Blazer
I use my vehicle for
CaR AuDiO ComPeTiTioNs
 
Growl... for a 4 cyl Ranger

Posted on 07/27/2007 by Evan S. - 1996 Ford Ranger (Apple Valley,CA)

1 of 2 people found the following review helpful.

"Awesome agressive deep sound. Loud enough without intake, even louder with. I recommend it to anyone who wants sound that will last. No iternal parts that may break down over the years, just a fat resonating chamber...good stuff."

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About Evan S.
Vehicle
1996 Ford Ranger
I use my vehicle for
Commuting and Playing in the dirt!
 
sweet

Posted on 07/20/2007 by Adam D. - 2003 Chevy Silverado (Muenster,TX)

1 of 2 people found the following review helpful.

"This muffler is great, very little interior resonace with aggressive exterior growl. I really like me new muffler."

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About Adam D.
Vehicle
2003 Chevy Silverado
I use my vehicle for
daily driving
 
NICE

Posted on 07/06/2007 by Michael W. - 1984 Dodge Ram (Rancho Palos Verdes,CA)

0 of 1 people found the following review helpful.

"I think that the Flowmaster Muffler 40 Series Delta Flow sounds great on my truck! The truck preforms much better! While it also sonds great! The dual exaust looks great and ads to my truck with great features! Thanx for the product and i look foward to buying more products form you guys!"

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About Michael W.
Vehicle
1984 Dodge Ram
I use my vehicle for
Work & Fun
 
Nice rumble

Posted on 06/29/2007 by James M. - 2007 Ford F150 (Collegeville,PA)

3 of 4 people found the following review helpful.

"Installing it was a breeze. I like the rumble of the Delta 40, however, I wish it was a little louder."

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About James M.
Vehicle
2007 Ford F150
 
Nice . . 8/9 out of 10

Posted on 06/25/2007 by Andrew R. - 2004 Dodge Ram (Saginaw,MI)

4 of 6 people found the following review helpful.

"I had glass packs added to my 04 Dodge Ram for inexpensive added exhaust sound. I decided to get the dual outlet Delta Force Muffler to make a change. To really see about the torque/hp added and the clean sound. The glass packs' raspy start was replaced by a real THROATY DEEP sound. Really made it sound like a DODGE TRUCK. Torque gains were noticeable but nothing mind boggling. It was really the deep power sound that gave people walking by, driving by look at what i had going. MPG gains? = None. I didn't see a change at all. At 55mph at 4300 rpms i was running about 24mpg on the comp, but now it's 21mpg. Other constant rates seemed to differ also. Overrall though, i love the sound. Interior is not loud, and that's what I want. U can definitely hear it, it's deep but nothiing too much that will give the headaches."

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About Andrew R.
Vehicle
2004 Dodge Ram
I use my vehicle for
Everythng
 
Flowmaster Mufflers 40 Series Delta Flow on 04 silverado

Posted on 04/03/2007 by Patrick H. - 2004 Chevy Silverado (Snoqualmie,WA)

2 of 2 people found the following review helpful.

"This muffler is badass, adds the perfect agression i needed for my truck, low interior sound, but an agressive loud and powerful sound on the outside, definatly a head turner, this is on my 5.3L V8 it sounds SO GOOD!"

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About Patrick H.
Vehicle
2004 Chevy Silverado
I use my vehicle for
everything
 
What a difference!!

Posted on 03/16/2007 by David L. (Jacksonville,FL)

1 of 1 people found the following review helpful.

"I started with the 50 suv series on my 03f150 w/4.6L which also has a K&N intake, Throttle body spacer, and edge programmer. Now it sounds much more throaty. Interior resonance is definately increased but not to the point of annoince. I rate the muffler w/5stars but they sent me the wrong one. I ordered 2.5I/O and received 2.5I-2.25O. Shipping was super fast, Just wish I got what I paid for."

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About David L.
 
What can I say, they're Flowmasters

Posted on 03/07/2007 by Cornelio A. - 2006 Chevy Impala (Houston,TX)

2 of 3 people found the following review helpful.

"This is the 4th vehicle I've used Flowmasters on, and once again, they deliver. Awesome sound! Best sounding mufflers in my opinion."

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About Cornelio A.
Vehicle
2006 Chevy Impala
I use my vehicle for
commuting & family
 
AWSOME!!

Posted on 01/17/2007 by Perry T. - 1995 Chevy C/K 1500 (Metter,GA)

1 of 1 people found the following review helpful.

"i have a '95 chevy 1500 with the small block 350 and with the new FLOW 40 Series, you can really tell the differnce and better gas mileage. The sound has a great deep, agressive tone but nothing too loud. And shippment from Autoanything.com only took a day once payment was excepted. ill definitely be doing more business with them. Thanks"

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About Perry T.
Vehicle
1995 Chevy C/K 1500
I use my vehicle for
everyday use.
 
pussey cat

Posted on 08/27/2006 by Donald P. - 1998 Dodge Ram (Dingmansferry,PA)

0 of 3 people found the following review helpful.

"was waiting a much more aggresive sound"

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About Donald P.
Vehicle
1998 Dodge Ram
I use my vehicle for
commuting
 
awesome

Posted on 03/09/2006 by Gregory K. - 2000 Lincoln LS (Tonganoxie,KS)

1 of 3 people found the following review helpful.

"They sound fantsatic! had many compliments on them! thanks Greg"

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About Gregory K.
Vehicle
2000 Lincoln LS
I use my vehicle for
commuting
 
40 series pleasure

Posted on 01/23/2006 by Leon S. - 2005 Dodge Ram (Laurel,MS)

1 of 2 people found the following review helpful.

"The 40 series sounds great on my 05 Dodge Ram 1500 v6. It dows have a slightly irritating sound on hard acceleration, and I have yet to see mileage inprovements. Overall this muffler is still a great sounding replacement for a stock exhaust. @ idle the truck sounds just like a v8. While driving, interior sound is considerably less than the 50 series and allows for a comfortable ride. Enjoy!"

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About Leon S.
Vehicle
2005 Dodge Ram
I use my vehicle for
communting-pleasure
Showing 26 - 38 of 38 Customer Reviews
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