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 features famous Flowmaster power and torque with a milder tone and reduced interior resonance
  • The perfect muffler for late-model performance cars and dual-exhaust cruisers
  • Durable 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 to minimize and provide superior exhaust scavenging
  • Original Flowmaster two-chamber design provides excellent horsepower and torque
  • Casing embossed with the famous Flowmaster name
  • Your Flowmaster 40 Series Delta Flow Muffler is backed by a 1-year warranty

Description

The perfect pick for later-model performance cars, Flowmaster’s 40 Series Delta Flow Muffler provides power and performance without the deafening interior resonance.

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 tone down interior sound, they fuel increased exhaust scavenging to provide maximum power.

Also ideal for dual exhaust cruisers, the Flowmaster 40 Series Delta Flow Muffler features the excellent 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 1-year warranty

Notes

  • Flowmaster 40 Series Delta Flow Mufflers come in an assortmant 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

Average Customer Rating

  (35)
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2005 GMC SIERRA 1500 SLT

Posted on 09/16/2008 by Pawel S. - 2005 GMC Sierra (Fort Walton Beach,FL)

0 of 1 people found the following review helpful.

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Quality

"I love it . That`s what I wanted !!!"

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About Pawel S.
Vehicle
2005 GMC Sierra
 
new truck

Posted on 08/14/2008 by Schon W. - 2005 Ford F-150 (Olympia,WA)

1 of 2 people found the following review helpful.

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Ease of Installation
Price/Value
Quality

"had straight pipes and was to much for me this was a good sound with out to much"

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About Schon W.
Vehicle
2005 Ford F-150
I use my vehicle for
everyday use
 
Flowmaster 40 series

Posted on 08/12/2008 by John L. - 1996 Mitsubishi 3000GT (Sheboygan,WI)

1 of 1 people found the following review helpful.

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Ease of Installation
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Quality

"Sounded great! Very easy to install and worked great with a dual tip set up. Made my car sound more aggressive and noticeable. Caught a lot of people's attention on the road."

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About John L.
Vehicle
1996 Mitsubishi 3000GT
I use my vehicle for
Show car and auto-x
 
Flowmaster 40 delta flow review

Posted on 08/08/2008 by Mickey D. - 2001 Dodge Durango (Simi Valley,CA)

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Ease of Installation
Price/Value
Quality

"I really enjoy my new muffler. The sound is awesome, nice deep tone :). makes my 2001 dodge durango look and sound tuff. only thing that bothers me is that they didnt have the muffler in stainless steel but in aluminum, its not that big of a problem though because flowmaster change their warranty to 10 years. but other wise really great product would recommend to anyone."

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About Mickey D.
Vehicle
2001 Dodge Durango
 
Great Sound

Posted on 07/25/2008 by John A. - 2005 Subaru Impreza (Delta,CO)

1 of 1 people found the following review helpful.

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Ease of Installation
Price/Value
Quality

"I put this muffler on my subaru impreza outback sport and man does it sound mean. I went out on a limb when I bought it because I had not found any videos or recordings of flowmaster mufflers on subarus but the sound i got is very satisfying."

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About John A.
Vehicle
2005 Subaru Impreza
I use my vehicle for
Commuting, etc...
 
Flowmaster 40 Series

Posted on 05/23/2008 by John M. - 2007 Ford Mustang (Las Vegas,NV)

6 of 6 people found the following review helpful.

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Ease of Installation
Price/Value
Quality

"I've had the Flow 40 Delta on my 2007, v6 Mustang for a few weeks now and they sound amazing. They are loud enough on the outside and resonate just enough on the inside to be fun and not give me a headache. I even drove from Las Vegas to Denver without any problems or annoyances. If you are looking for a great muffler with very good sound, go with this one. I searched for months before I settled on the Flow 40's and I couldn't be happier. Also cheap instal and I had a chrome tip welded on that really completes the look."

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About John M.
Vehicle
2007 Ford Mustang
 
Great Flow

Posted on 04/27/2008 by Nick D. - 2003 Chevy Truck S10 (Murfreesboro,TN)

3 of 3 people found the following review helpful.

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Price/Value
Quality

"Great muffler for the price...sounds great and has that deep growl at idle too."

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About Nick D.
Vehicle
2003 Chevy Truck S10
I use my vehicle for
everyday
 
nice soud with better fuel economy

Posted on 04/10/2008 by Jason F. (Eagle Mountain,UT)

1 of 1 people found the following review helpful.

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Ease of Installation
Price/Value
Quality

"This flow master has a very nice sound not too loud for my wife when she rides inside the cab of our 2004 chevy short bed v8, and I noticed an immediate difference in power and fuel economy well worth the price it would have been better if it cost less but... still worth it!"

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About Jason F.
 
SUPER 40'S DELTA FLOW!!!

Posted on 04/10/2008 by Treston S. - 1991 Toyota Pickup (East Wenatchee,WA)

1 of 1 people found the following review helpful.

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Price/Value
Quality

"All i can say, is that everytime i start my truck and take off ; It gives a beautiful mellow sound that puts a huge grin across my face. It was exactly what i wanted, i got the delta flow cuz I didn't want it to be super loud but have a mellow sound. And it matched the sound i was looking for. Also gave better acceleration on highway up hill and don't have to downshift to fourth as quickly. not sure about milage, I love the sound so I kinda have a heavy foot for the gas pedal. all a round its an awesome product and i'm very happy to have purchased it!!!"

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About Treston S.
Vehicle
1991 Toyota Pickup
I use my vehicle for
everything that makes my heart content
 
08 Tacoma w/Flowmaster 40 Series Delta Flow

Posted on 04/10/2008 by Aaron M. - 2008 Toyota Tacoma (Merced,CA)

2 of 2 people found the following review helpful.

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Price/Value
Quality

"Awesome muffler. I put this muffler on my 08 Tacoma Dbl Cab 4.0 V6. Wasn't sure if i liked the tone at first but like everyone says it works itself in. Sure enough after putting some miles on it, it sounds completely different. Exactly the sound i was looking for. I'm glad i made this choice."

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About Aaron M.
Vehicle
2008 Toyota Tacoma
I use my vehicle for
Snowboarding, Motor Sports, Fishing, Traveling, Camping