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Flowmaster Super 44 Muffler 9424472

Product Information
List Price:
Our Price:
Part #:
Aluminized Steel
Inlet Style:
Center Inlet & Dual Outlet
Outlet Dimensions:
2.25" Inlet & Outlet
2.25" Inlet | 2.25" Outlet
  • 13.5" muffler
  • 4" x 9.75" body
  • Aggressive sound
  • Deep, aggressive, high performance exhaust note
  • Two chamber power and torque enhancing design


  • Deep, Aggressive Tone: The Super 44 is Flowmaster's most aggressive muffler. It offers a deep, throaty tone that offers a notable tone both inside and outside of the car.
  • Increased Flow: The Super 44 muffler features an increased flow path radius that builds more horsepower and reduces restrictions.
  • For Street or Strip: Super 44 mufflers are perfect for muscle cars and other high horsepower engines. Their performance inspired design improves exhaust flow along with a very aggressive tone.
  • Aluminized Steel: Flowmaster mufflers are constructed of heavy duty aluminized steel, not low end steel with a sprayed on aluminized coating.
  • No internal packing to blow out
  • Made in the USA - Santa Rosa, CA

The Super 44 muffler from Flowmaster is their newest design, offering increased performance and an unbeatable sound. It features the latest technology and is designed as a direct replacement for the Original 40 Series muffler that was introduced 25 years ago. The Super 44 muffler is designed for performance muscle cars and trucks and ideal for use on the street or at the strip. It is Flowmaster's most aggressive muffler ever made and offers a deep, powerful tone that sounds great from the inside or outside of your vehicle. The Super 44 Series muffler features an improved flow path radius for high horsepower engines, creating more power and torque than any other muffler. The aluminized muffler features a case design of 13"L x 9.75"W x 4"H and a total tip to tip length of 19". The Super 44 is designed for 2.25"-3" exhaust systems.

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View Available Part Numbers For This Product Line

California Residents: Prop 65 Warning

Frequently Asked Questions

What is Flowmaster's warranty?
All Flowmaster products built of aluminized steel have a 10 year limited warranty against defective materials and workmanship. All stainless steel mufflers have a 10 year limited warranty against defective materials and workmanship.

What is "Delta Flow" technology?
Flowmaster's "Delta Flow" technology has evolved from extensive Research & Development at race-tracks around the country. This new technology provides superior scavenging while reducing resonance inside the vehicle. What you can expect is improved performance while maintaining a pleasant tone, both inside and outside the vehicle.

What materials are used to build Flowmaster mufflers?
All Flowmaster products are fully mig welded and built from 16 gauge aluminized steel for durability and value. Specific part numbers of the 40 and 50 series are also offered in 409 stainless steel, while the Hushpower II mufflers are offered in either 409 stainless steel, or 304 stainless steel.

What pipe size should I use for a street application?
In general, the following guidelines should be applied for street applications.

2" tubing up to 100 hp per pipe
2.25" tubing up to 160 hp per pipe
2.5" tubing up to 200 hp per pipe
3" tubing up to 300 hp per pipe 
What is the difference between a 40 series and a 50 series muffler?
Both mufflers have the same sound outside the vehicle, but each has varying sound levels generated inside the vehicle. The 40 series (two chamber) will resonate inside the vehicle, generally around 1800-2000 rpms and also again around 2400-2600 rpms. The 50 series (three chamber) incorporates an H-chamber that helps eliminate this interior resonance in the cab area of your vehicle.

Will I lose power going from a 40 series to a 50 series, or to a 70 series?
No. Flowmaster engineers each series of mufflers for very low restriction with the main differences being varying sound levels both inside, and outside your vehicle. This way you can customize your vehicles sound levels to your vehicles needs and sound preference.

Do I need to install an "H" pipe to my dual exhaust?
Flowmaster strongly recommends using an "H" pipe, commonly known as a "balance tube" on all "true dual" exhaust systems. An "H" pipe equalizes the pressures between both banks of the engine giving a broader and flatter torque curve throughout the rpm range. It also eliminates "back-rap" common on deceleration, and creates a deeper mellower tone both inside and outside of the vehicle.

Is an "X" pipe better than and "H" pipe?
Over the years, Flowmaster's testing of all types of crossovers, including "X pipes", has revealed no substantial benefits over a properly installed "H" pipe on street driven applications. However, in race applications with small cubic inch engines and /or restricted (small bore) carburetors, will respond well to the addition of X pipes, tri-y styled collectors and/or properly designed single exhaust systems.

Will my late model vehicle run better if I replace the single inlet muffler with a true dual exhaust system?
Flowmaster does not recommend replacing factory single inlet exhaust systems with a "true dual" system on computer controlled vehicles. The computers in most late model vehicles will not be able to compensate with the fuel needed with an almost doubling of the exhaust flow. Flowmasters dual outlet kits will give you the look of a "true dual" system, while optimizing the vehicles performance.

Do I need to run tailpipes after the mufflers?
Yes, Flowmaster highly recommends running tailpipes out from under the vehicle. This directs the exhaust fumes away from the vehicle, while minimizing the sound transmitted into the cab area of the vehicle.

What kind of performance gains can I expect when installing Flowmasters on my vehicle?
Performance gains will vary dependent upon your application. The more power the vehicle makes, the bigger the gains will be. Generally, a 5-7% gain of power is fairly typical, while 1-2 mpg can be achieved. That is if you can keep your foot out of the gas to hear that Flowmaster sound.

How can I be sure that I'm buying a Flowmaster muffler?
The Flowmaster name is embossed in every muffler case that Flowmaster builds. If it doesn't say Flowmaster on the case, it's not a real Flowmaster muffler.


Watch This Video
Flowmaster Exhaust Technology Explained - Chambered Technology 101


3 Year Warranty

Flowmaster is offering a 3 year limited warranty on the aluminum Super 44 Series Delta Flow Mufflers.


Flowmaster mufflers are designed to work with new or existing exhaust systems.  They offer slip on installation and can be welded or clamped into place.  Due to the use of heavier materials, Flowmaster recommends spot welding the joints when using clamps.  On some applications it will be necessary to cut or splice when adding Flowmaster mufflers to an existing exhaust system.