Flowmaster flo8043041 - 40 Series Stainless Steel Muffler

The Original 40 series muffler delivers an aggressive exterior and interior tone. If you're looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability. 40 Series Stainless Steel - 3.00 Offset In / 3.00 Center Out - Aggressive Sound Universal Muffler - Some adaptation may be required.

• Excellent Street/Strip and Off Road application
• Durable fully welded 409SS stainless steel
• Aggressive Sound Exterior Exhaust Tone
• Noticeable interior resonance

The Flowmaster 40 Series stainless steel muffler delivers an aggressive exterior and interior exhaust tone for street, strip, and off-road applications. Designed for drivers seeking the original Flowmaster sound, this universal muffler features a 3.00-inch offset inlet and a 3.00-inch center outlet. Some adaptation may be required for installation.

Constructed from 16-gauge 409S stainless steel and fully MIG welded, the muffler is built for durability. Its aggressive exterior tone is paired with noticeable interior resonance. Fitment data lists select 1999–2003 Ford F-250, F-250 Super Duty, and Ford Expedition applications; verify vehicle configuration and installation requirements before purchase.

Key Features & Performance Benefits

• Original 40 Series Sound: Delivers an aggressive exterior and interior exhaust tone.
• 409S Stainless Steel Construction: Uses durable 16-gauge stainless steel material.
• Fully MIG Welded: Supports long-term durability.
• Versatile Application: Suitable for street, strip, and off-road use.

Key Product Specifications & Technical Data

• Brand: Flowmaster
• Part Number: flo8043041
• Series: 40 Series
• Product Type: Universal muffler
• Material: 409S stainless steel
• Material Gauge: 16 gauge
• Inlet Configuration: 3.00-inch offset inlet
• Outlet Configuration: 3.00-inch center outlet

What's Included in the Box

One Flowmaster 40 Series stainless steel muffler.

Fitment

Listed applications include 1999 Ford F-250, 1999 Ford F-250 Super Duty, 2000 Ford F-250 Super Duty, 2001 Ford F-250 Super Duty, 2002 Ford F-250 Super Duty, and 2003 Ford Expedition. Some adaptation may be required.

Fitments:
1987 Chevrolet Blazer Custom Deluxe
1987 Chevrolet Blazer Silverado
1987 Chevrolet R10 Suburban Custom Deluxe
1987 Chevrolet R10 Suburban Scottsdale
1987 Chevrolet R10 Suburban Silverado
1987 Chevrolet V10 Suburban Custom Deluxe
1987 Chevrolet V10 Suburban Scottsdale
1987 Chevrolet V10 Suburban Silverado
1987 Chevrolet V20 Suburban Custom Deluxe
1987 GMC Jimmy Base
1987 GMC Jimmy Sierra Classic
1987 GMC R1500 Suburban Base
1987 GMC R1500 Suburban High Sierra
1987 GMC R1500 Suburban Sierra Classic
1987 GMC V1500 Suburban Base
1987 GMC V1500 Suburban High Sierra
1987 GMC V1500 Suburban Sierra Classic
1988 Chevrolet Blazer Scottsdale
1988 Chevrolet Blazer Silverado
1988 Chevrolet R10 Suburban Scottsdale
1988 Chevrolet R10 Suburban Silverado
1988 Chevrolet V10 Suburban Scottsdale
1988 Chevrolet V10 Suburban Silverado
1988 GMC Jimmy Base
1988 GMC Jimmy Sierra Classic
1988 GMC R1500 Suburban Base
1988 GMC R1500 Suburban Sierra Classic
1988 GMC V1500 Suburban Base
1988 GMC V1500 Suburban Sierra Classic
1989 Chevrolet Blazer Scottsdale
1989 Chevrolet Blazer Silverado
1989 Chevrolet R1500 Suburban Scottsdale
1989 Chevrolet R1500 Suburban Silverado
1989 Chevrolet V1500 Suburban Scottsdale
1989 Chevrolet V1500 Suburban Silverado
1989 GMC Jimmy Base
1989 GMC Jimmy Sierra Classic
1989 GMC R1500 Suburban Base
1989 GMC R1500 Suburban Sierra Classic
1989 GMC V1500 Suburban Base
1989 GMC V1500 Suburban Sierra Classic
1990 Chevrolet Blazer Scottsdale
1990 Chevrolet Blazer Silverado
1990 Chevrolet R1500 Suburban Scottsdale
1990 Chevrolet R1500 Suburban Silverado
1990 Chevrolet V1500 Suburban Scottsdale
1990 Chevrolet V1500 Suburban Silverado
1990 GMC Jimmy Base
1990 GMC Jimmy Sierra Classic
1990 GMC R1500 Suburban Base
1990 GMC R1500 Suburban SLE
1990 GMC V1500 Suburban Base
1990 GMC V1500 Suburban SLE
1991 Chevrolet Blazer Scottsdale
1991 Chevrolet Blazer Silverado
1991 Chevrolet R1500 Suburban Scottsdale
1991 Chevrolet R1500 Suburban Silverado
1991 Chevrolet V1500 Suburban Scottsdale
1991 Chevrolet V1500 Suburban Silverado
1991 GMC Jimmy Base
1991 GMC R1500 Suburban Base
1991 GMC V1500 Suburban Base
1994 Dodge Ram 2500 Base
1994 Dodge Ram 3500 Base
1995 Dodge Ram 2500 Base
1995 Dodge Ram 3500 Base
1996 Dodge Ram 2500 Base
1996 Dodge Ram 3500 Base
1999 Ford F-250 Base
1999 Ford F-250 Lariat
1999 Ford F-250 XL
1999 Ford F-250 XLT
1999 Ford F-250 Super Duty Lariat
1999 Ford F-250 Super Duty XL
1999 Ford F-250 Super Duty XLT
1999 Ford F-350 Super Duty Lariat
1999 Ford F-350 Super Duty XL
1999 Ford F-350 Super Duty XLT
2000 Ford F-250 Super Duty Lariat
2000 Ford F-250 Super Duty XL
2000 Ford F-250 Super Duty XLT
2000 Ford F-350 Super Duty Lariat
2000 Ford F-350 Super Duty XL
2000 Ford F-350 Super Duty XLT
2001 Ford F-250 Super Duty Lariat
2001 Ford F-250 Super Duty XL
2001 Ford F-250 Super Duty XLT
2001 Ford F-350 Super Duty Lariat
2001 Ford F-350 Super Duty XL
2001 Ford F-350 Super Duty XLT
2002 Ford F-250 Super Duty Lariat
2002 Ford F-250 Super Duty XL
2002 Ford F-250 Super Duty XLT
2002 Ford F-350 Super Duty Lariat
2002 Ford F-350 Super Duty XL
2002 Ford F-350 Super Duty XLT
2003 Ford Expedition Eddie Bauer
2003 Ford Expedition XLT
2003 Ford F-250 Super Duty Lariat
2003 Ford F-250 Super Duty XL
2003 Ford F-250 Super Duty XLT
2003 Ford F-350 Super Duty Lariat
2003 Ford F-350 Super Duty XL
2003 Ford F-350 Super Duty XLT
2003 Lincoln Navigator Base
2004 Ford Expedition Eddie Bauer
2004 Ford Expedition NBX
2004 Ford Expedition XLT
2004 Ford Expedition XLT Sport
2004 Ford F-250 Super Duty Harley-Davidson Edition
2004 Ford F-250 Super Duty King Ranch
2004 Ford F-250 Super Duty Lariat
2004 Ford F-250 Super Duty XL
2004 Ford F-250 Super Duty XLT
2004 Ford F-350 Super Duty Harley-Davidson Edition
2004 Ford F-350 Super Duty King Ranch
2004 Ford F-350 Super Duty Lariat
2004 Ford F-350 Super Duty XL
2004 Ford F-350 Super Duty XLT
2004 Lincoln Navigator Base
2005 Ford Expedition Eddie Bauer
2005 Ford Expedition Limited
2005 Ford Expedition XLS
2005 Ford Expedition XLT
2005 Lincoln Navigator Base
2006 Ford Expedition Eddie Bauer
2006 Ford Expedition King Ranch
2006 Ford Expedition Limited
2006 Ford Expedition XLS
2006 Ford Expedition XLT
2006 Ford Expedition XLT Sport
2006 Lincoln Navigator Luxury
2006 Lincoln Navigator Ultimate
2007 Ford Expedition Eddie Bauer
2007 Ford Expedition EL Eddie Bauer
2007 Ford Expedition EL Limited
2007 Ford Expedition EL XLT
2007 Ford Expedition Limited
2007 Ford Expedition XLT
2007 Lincoln Navigator L Luxury
2007 Lincoln Navigator L Ultimate
2007 Lincoln Navigator Luxury
2007 Lincoln Navigator Ultimate
2008 Ford Expedition Eddie Bauer
2008 Ford Expedition EL Eddie Bauer
2008 Ford Expedition EL King Ranch
2008 Ford Expedition EL Limited
2008 Ford Expedition EL XLT
2008 Ford Expedition Funkmaster Flex Edition
2008 Ford Expedition King Ranch
2008 Ford Expedition Limited
2008 Ford Expedition XLT
2008 Lincoln Navigator Base
2008 Lincoln Navigator L
2009 Ford Expedition Eddie Bauer
2009 Ford Expedition EL Eddie Bauer
2009 Ford Expedition EL King Ranch
2009 Ford Expedition EL Limited
2009 Ford Expedition EL XLT
2009 Ford Expedition King Ranch
2009 Ford Expedition Limited
2009 Ford Expedition XLT
2009 Lincoln Navigator Base
2009 Lincoln Navigator L
2010 Ford Expedition Eddie Bauer
2010 Ford Expedition EL Eddie Bauer
2010 Ford Expedition EL King Ranch
2010 Ford Expedition EL Limited
2010 Ford Expedition EL XLT
2010 Ford Expedition King Ranch
2010 Ford Expedition Limited
2010 Ford Expedition XLT
2010 Lincoln Navigator Base
2010 Lincoln Navigator L
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2023 GMC Sierra 1500 SLE
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Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Units Per Sku: 1
Regular Stock: t