Flowmaster® 8042443 - 40 Series Original Stainless Steel Muffler

Flowmaster Performance Exhaust Systems
Flowmaster® - 40 Series Original MufflerFlowmaster® - 40 Series Original MufflerFlowmaster® - 40 Series Original Muffler - 3D ViewFlowmaster® - Offset Inlet / Offset Outlet MufflerFlowmaster® - 40 Series Original Muffler Aggressive SoundFlowmaster® - Product Information and TechnologyFlowmaster Authorized Dealer
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40 Series Original Stainless Steel Muffler by Flowmaster®, AGGRESSIVE SOUND, 2.25" Offset Inlet / 2.25" Offset Outlet, 4" Thick x 9.75" Wide x 13" Case Length x 19" Overall Length. This is the muffler that launched the success of Flowmaster. It is an aggressive sounding street/strip muffler that delivers the famous powerful “Flowmaster Sound”. If you really want to hear that great muscle car tone both inside and outside the vehicle, this is the muffler for you.

Flowmaster Muffler Family Flowmaster Flowmaster


  • The Original High Performance Flowmaster Muffler
  • Aggressive Sound for the Enthusiasts Who Love Their Exhaust to be LOUD
  • Made in 16-Gauge Aluminized Steel or 409S Stainless Steel
  • Fully MIG-welded for Maximum Durability
  • Limited Lifetime Warranty on Stainless Steel Mufflers

The Super 40 Series mufflers are designed for the true performance enthusiasts. The flexibility and control offered by the unique Flowmaster technology has been used to build a muffler specifically for high horsepower road cars. The exterior sound has the exciting tone of a true-blooded racing engine, but subdued to legal limits. As even the most enthusiastic performance engine fan tires from constant high sound volume, the Flowmaster technology also has been used to tune the resonance sounds that reach the interior of the vehicle to a comfortable level, allowing the performance car driver to enjoy the racing music for hours on end without strain.

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

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.

Brand: Flowmaster       Part Number: 8042443       UPC: 700042022540
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Flowmaster® has its roots in solving the engine noise problems encountered by California racers in the 1980s. In 1983 Flowmaster’s founder, Ray Flugger, created his first patented design of racing silencers, which dampened noise with minimal loss of power. Ray attached handles to ease carrying the square shaped race mufflers through the race pits, and the mufflers became known as the "suitcase mufflers." Today, the innovative Flowmaster mufflers are the result of years of development with top race engine builders, thousands of hours of dyno research and "real-world" on-track testing.

Vehicle FitmentThis part is compatible with 96 vehicle(s)
Year Make Model Fitment Notes
2013 Chevy Camaro    LS / LT
2013 Chrysler 300    Base / S / Touring
2013 Dodge Challenger    R/T / SXT
2013 Ford Mustang    Base
2012 Chevy Camaro    LS / LT
2012 Chrysler 300    Base / Limited / S
2012 Dodge Challenger    R/T / R/T Classic / SXT / SXT Plus
2012 Ford Mustang    Base
2011 Chevy Camaro    LS / LT
2011 Chrysler 300
2011 Dodge Challenger    R/T / SE
2011 Ford Mustang    Base
2010 Chevy Camaro    LS / LT
2010 Chrysler 300    300C
2010 Dodge Challenger    R/T / SE
2010 Dodge Charger    R/T / SE / SXT
2010 Ford Mustang    4.0L
2009 Chrysler 300    300C
2009 Dodge Challenger    R/T / SE
2009 Dodge Charger    R/T / SXT; SE 2.7L / 3.5L
2009 Ford Mustang    Base
2008 Chrysler 300    300C
2008 Dodge Charger    R/T / SXT; SE 2.7L / 3.5L
2008 Dodge Magnum    R/T / SE / SXT
2008 Ford Mustang    Base
2007 Chrysler 300    Limited / Touring; 2.7L
2007 Dodge Charger    Base / R/T / SE / SXT
2007 Dodge Magnum    R/T / SE / SXT
2007 Ford Mustang    Base
2006 Chrysler 300    Limited / Touring; 2.7L
2006 Dodge Charger    Base / Daytona R/T / R/T / SE / SXT
2006 Dodge Magnum    R/T / SE / SXT
2006 Ford Mustang    Base
2005 Chrysler 300
2005 Dodge Magnum
2005 Ford Mustang    Base
2004 Ford Mustang    GT / SVT Cobra
2003 Ford Mustang    GT / SVT Cobra 10th Anniversary
2002 Ford Mustang    GT
2001 Ford Mustang    GT / GT Bullitt
2000 Ford Mustang    GT
1999 Ford Mustang    GT
1998 Ford Mustang    GT
1997 Ford Mustang    GT
1996 Chevy Caprice    5.7L
1996 Chevy Impala
1996 Ford Mustang    GT
1995 Chevy Caprice    5.7L
1995 Chevy Impala
1995 Ford Mustang    GT
1994 Chevy Caprice    5.7L
1994 Chevy Impala
1994 Ford Mustang    GT
1993 Ford Mustang    GT / LX 5.0L
1992 Ford Mustang    5.0L
1991 Ford Mustang    5.0L
1990 Ford Mustang    5.0L
1989 Ford Mustang    5.0L
1988 Ford Mustang    5.0L
1988 Oldsmobile Cutlass    Cutlass Supreme Classic / Classic Brougham
1987 Ford Mustang    5.0L
1987 Oldsmobile Cutlass    Cutlass Salon / Cutlass Supreme 5.0L
1986 Ford Mustang    5.0L; SVO
1986 Oldsmobile Cutlass    Cutlass Salon / Cutlass Supreme 5.0L
1985 Oldsmobile Cutlass    Cutlass Salon / Cutlass Supreme 5.0L / 5.7L
1984 Oldsmobile Calais    5.0L / 5.7L
1984 Oldsmobile Cutlass    5.0L / 5.7L
1983 Oldsmobile Calais    5.0L / 5.7L
1983 Oldsmobile Cutlass    5.0L / 5.7L
1982 Oldsmobile Calais    5.0L / 5.7L
1982 Oldsmobile Cutlass    5.0L / 5.7L
1981 Oldsmobile Calais    5.7L
1981 Oldsmobile Cutlass    Cutlass Cruiser 5.0L / 5.7L; Cutlass / Cutlass Salon / Cutlass Supreme 5.7L
1980 Oldsmobile Calais    5.0L / 5.7L
1980 Oldsmobile Cutlass    Cutlass / Cutlass Cruiser / Cutlass Salon / Cutlass Supreme Brougham 5.0L / 5.7L; LS 5.0L / 5.7L; Cutlass Cruiser / Cutlass Salon / Cutlass Supreme Base 5.0L / 5.7L
1979 Oldsmobile Calais    5.0L / 5.7L
1979 Oldsmobile Cutlass    Cutlass Salon / Cutlass Supreme 5.0L / 5.7L
1978 Chevy Blazer    5.7L / 6.6L
1978 GMC Jimmy    5.7L / 6.6L
1978 Oldsmobile Calais    5.0L
1978 Oldsmobile Cutlass    Cutlass Salon 5.0L; Cutlass Supreme 5.0L / 5.7L
1977 Buick Skylark    4.9L / 5.0L / 5.7L
1977 Chevy Blazer    5.7L / 6.6L
1977 GMC Jimmy    5.7L / 6.6L
1976 Buick Skylark    4.3L / 5.7L
1976 Chevy Blazer    5.7L / 6.6L
1976 GMC Jimmy    5.7L / 6.6L
1975 Buick Skylark    4.3L / 5.7L
1973 Chevy Caprice    5.7L / 6.6L / 7.4L
1972 Chevy Caprice    5.7L / 6.6L / 7.4L
1971 Chevy Caprice    5.7L / 6.6L / 7.4L
1970 Chevy Caprice    5.7L / 6.6L / 7.4L
1969 Chevy Caprice    5.4L / 5.7L / 6.5L
1968 Chevy Caprice    5.0L / 5.4L / 6.5L
1967 Chevy Caprice    6.5L
1966 Chevy Caprice    6.5L
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