Flowmaster® - Street Muffler

41 reviews|Item # sp114645
Vehicle Specific
  • Select your vehicle when adding to cart to confirm fitment
Authorized Dealer
$142.45 - $437.90
$149.95 - $460.95Save 5%
Availability Varies - Depends on Product Options
Have a Question? Ask a Specialist
888-577-6964Live Chat

Features

  • Stainless Steel Construction
  • Moderate Sound exterior exhaust tone
  • Includes Hangers and Hardware for Easy Installation
  • Dyno tuned for maximum performance
  • Flowmaster Special Offers

Product Details

Street Muffler by Flowmaster®. The 2-chamber design of this muffler, incorporating the patented Flowmaster Delta Flow Technology, has enabled the company to create a performance muffler with an aggressive exterior sound combined with a subdued (but noticeable) interior resonance. This is a muffler that makes a true performance statement without being overly tiring for the driver.

Flowmaster - Delta Flow Technology

Like all Flowmaster mufflers, the 40 Series Delta Flow mufflers improve exhaust scavenging for increased torque and horsepower. The precision positioned Delta deflectors have a dual function, as they are positioned to create a low pressure zone that improves exhaust scavenging, while also reducing the interior resonance. The unique design of the 40 Series two chamber delta flow mufflers makes them perfect for performance cars used daily or on long drives. The exterior sound will turn heads, while the interior sound level provides the driver with the beautiful music of a performance engine at a comfortable sound level. The mufflers are fully MIG welded for maximum durability and you have a choice between aluminized mild steel and stainless steel construction.

Flowmaster mufflers differ in technology and tuning, and thus in tone and character, to give your performance engine a sound to your personal liking.

All Flowmaster mufflers are tuned for maximum performance. All Flowmaster mufflers produce a beautiful deep performance tone. Choosing the right Flowmaster muffler is not a technical decision – it is all up to your personal taste. It’s A Sound Decision®.

Flowmaster mufflers employ two unique technologies developed by the company; the patented Delta Flow and the Laminar Flow. They give different characters of sound and can be tuned to achieve the desired exhaust note. Flowmaster Exhaust System Technology is so versatile, and gives such a high degree of control, that it is used both by racers, who want maximum power, and by the U.S. Air Force in Stealth applications where maximum silence and minimum heat emissions are prime considerations. Be it for a domestic or import truck, SUV, off-road warrior, daily driver, muscle car, euro-spec cruiser or sport compact vehicle Flowmaster always has the right muffler for you.

Reviews

(41)
Only authorized customers can leave a review on our website. We would love to know what you like or dislike about the product. Share your opinion on product quality, appearance, installation, and other characteristics.
/5
1-10 of 41 Reviews
5 of 5
2019 Ram 1500 5.7 Hemi sounds great
Only took myself and another guy to install and sounds great!
Posted by Mike (Ogallala, NE) / April 11, 20252019 Ram 1500
5 of 5
40 Series Delta Flow™ Aluminized Steel Oval Black Exhaust Muffler
Sounds fantastic! Great step to modding your vehicle.
Posted by Jetmir (Chicago, IL) / November 08, 2019
4 of 5
Muffler
The muffler was fairly easy and straightforward to install. Mine was an exact fit, which I wanted.
Posted by Tim (Coleman, WI) / February 08, 20142013 Dodge Ram
5 of 5
The Sound of a V8, the Way it Should Be
This muffler is a true direct fit and is very easy to install. It has 3 chambers so it is not the most aggressive Flowmaster but it does sounds aggressive under heavy acceleration. It is quiet however at low RPM. My only issue is when the HEMI is on 4 cyl mode, there is a very noticeable drone sound. As for increase in performance, it is noticeable instantly. There is definitely an increase of torque throughout the power band. Accelerations are much better now.
Posted by Guy (Edmonton, AB) / April 03, 20132013 Dodge Ram
5 of 5
Flowmaster 40 Series Mufflers 942540
These mufflers from Flowmaster are the quality I expected for my muscle car projects. They sound great and add performance to my rides.
Posted by Matthew (Woodland Hills, CA) / February 13, 20131967 Oldsmobile Cutlass
5 of 5
Flowmaster 40 Series Delta Flow
At first, I was uncertain in choosing the Flowmaster 40 series Delta Flow/ Aggressive sound mufflers, but once I heard that great sound, I thought "WOW", that's the sound I was looking for. I waited until I had won the AACA( Antique Automobile Club of America) Senior Grand National Award in 2010, and then decided it was time to take off the original mufflers and enjoy the ride! The Flowmaster 40 series are just great and give my 64 Impala that muscle car sound that I wanted. Thanks Flowmaster for producing a great product!
Posted by Ronald (Woodburn, KY) / October 12, 20121964 Chevy Impala
5 of 5
Muffler Sounds Great.
The Flowmaster muffler sounds great on my truck. I shopped around and couldn't find a better price anywhere. Installation was easy, and it is definitely an exact fit replacement. Thanks for a great experience.
Posted by Michael (Monroe, MI) / August 25, 20122011 Dodge Ram
5 of 5
A Good Quality Flowmaster Muffler
The product looks great sounds. Everything was in good condition. The mechanic didn't have any problem install it.
Posted by Gregory (Cheraw, SC) / November 02, 20152007 GMC Yukon
5 of 5
Great!
Overall the muffler sounds good! I put it on my 1994 Jeep Grand Cherokee sport and ran it back to a 5-1/2 inch tip. It sounds amazing. Very mellow and deep!
Posted by Joseph (Slinger, WI) / October 23, 20151994 Jeep Cherokee
5 of 5
Amazing Sound!!!!
I am more than satisfied with this product. You definitely get the bang and growl for your buck, literally. Sounds like I changed the whole engine in my charger.
Posted by Rashawn (Poughkeepsie, NY) / October 05, 20142006 Dodge Charger