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
  • 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
  • Available in aluminized and stainless steel
  • Your Flowmaster 40 Series Delta Flow Muffler carries a 3-year warranty on aluminized and Limited Lifetime Warranty on stainless

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 or stainless 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 on aluminized and a Limited Lifetime Warranty on stainless steel.

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.
Reviews (46)
Questions & Answers (0)

Flowmaster Mufflers 40 Series Delta Flow Customer Reviews

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46 Customer Reviews

5 Star review rating 30
4 Star review rating 14
3 Star review rating 2
2 Star review rating 0
1 Star review rating 0
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Rumbles
0 of 1 people found the following review helpful.
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Reviewed by Tonia P (Kennewick, WA) 2006 Toyota Tacoma — Dec 28, 2011 5:04 PM
Great rumble
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Nice Sound!
0 of 0 people found the following review helpful.
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Reviewed by Hattan M (SARASOTA, FL) — Oct 06, 2011 11:16 AM
The finishing for this mufflers is not that great but the price it focus in the sound.Great sound for the price actually.
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04 Monte Carlo SS DEJ
2 of 3 people found the following review helpful.
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Reviewed by Robert H (Warren, MI) 2004 Chevy Monte Carlo — Apr 30, 2011 8:10 PM
Wow! Great sound. Did a lot of research about mufflers. Placed a call to Flowmaster and told them what I wanted. They were very helpful when I told them what I wanted. They recommended the series 40 for an aggresive sound. Autoanything was helpful also in my decision. Autoanything was prompt on delivery and the price was the best I found after doing much research about pricing.
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silverado
1 of 1 people found the following review helpful.
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Reviewed by Shayne M (Kalama, WA) — Feb 10, 2011 12:53 PM
It sounds good. I also put one on my wife's Tahoe and it sounds a little better on their than my Silverado but worth the money.
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Flowmaster
0 of 0 people found the following review helpful.
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Reviewed by Linda O (Mahwah, NJ) 1999 BMW 5-Series — Feb 07, 2011 3:04 PM
This muffler is great, dont get me wrong but the representatives did not know a thing about my car, although the said they did. I sent back and order a new muffler that they recomeneded two times before i had the right one. The car sounds great and has a very deep tone to it. Not too ricey at all which is what i was looking for. It has the loudest tone to it at about 2000-2500 rpms. The muffler was extremly hard to install and remember to get it bigger or smaller than the pipe on your car so that it may slide on or in and make it easier to weld. I am decentlt happy the way it turned out. (3.5 out of 5 stars)
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exactly wha I wanted
0 of 1 people found the following review helpful.
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Reviewed by Brendan s (Chandler, AZ) 2004 Ford Ranger — Jan 27, 2011 8:47 PM
I ordered this muffler, and I had it at my doorstep alot sooner than I was expecting. I will definately use this website again. The muffler adds an aggressive tone to my truck, without the annoying cab drone of other flowmasters. Highly recommend!!
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2010 Ram 1500 Crew Sport 4X4
0 of 0 people found the following review helpful.
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Reviewed by Bryan D (Hawkins, TX) — Dec 09, 2010 5:00 PM
At first I didn't like the sound of the delta 40, then I had the resonators removed, WOW, Love the sound of the delta 40. Just perfect for me... not too loud or too soft, sounds awesome when get on it.
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40 series delta flow on a 2008 Gmc Sierra 5.3
3 of 4 people found the following review helpful.
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Reviewed by Gary A (Alden, MI) 2008 GMC Sierra — May 01, 2010 6:22 AM
Sound level and tone from the exterior are perfect. Inside I have a bit of a harmonic drone around 1700 -1900 rpm range that is a bit too loud otherwise interior noise levels are about what I expected. This is my 3rd Flowmaster on as many trucks I'm sure it won't be my last.
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Sounds great!
5 of 5 people found the following review helpful.
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Reviewed by Jason S (Lexington, KY) 2009 Dodge Ram — Mar 30, 2010 4:58 AM
I have an 09 RAM 1500 and it sound mean as hell now!
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love it
3 of 3 people found the following review helpful.
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Reviewed by Klinton V (Belton, MO) 1998 Ford F-150 — Dec 15, 2009 8:20 PM
got this for my 5.4L f150 and it sounds great with my dual exhaust. totally recommend this for your truck
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