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Flowmaster Exhaust: Mufflers, Systems, Tips & More

Flowmaster Exhaust: Mufflers, Systems, Tips & More

For over 25 years, the Flowmaster tone has been thundering through streets and on tracks around the world! Housed in two state-of-the-art facilities, Flowmaster uses...

For over 25 years, the Flowmaster tone has been thundering through streets and on tracks around the world! Housed in two state-of-the-art facilities, Flowmaster uses premium materials along with extensive research and design to produce advanced, dyno-tuned exhaust systems and components that deliver power gains with an unmistakable sound. Some of the most distinct exhaust systems include the Flowmaster 40 Series and American Thunder mufflers, but there are plenty more choices—whether you want your ride to sound wild or mild, Flowmaster has the high performance exhaust parts you need.

For over 25 years, the Flowmaster tone has been thundering through streets and on tracks around the world! Housed in two state-of-the-art facilities, Flowmaster uses premium materials along with extensive research and design to produce advanced, dyno-tuned exhaust systems and components that deliver power gains with an unmistakable sound. Some of the most distinct exhaust systems include the Flowmaster 40 Series and American Thunder mufflers, but there are plenty more choices—whether you want your ride to sound wild or mild, Flowmaster has the high performance exhaust parts you need.

Individual Parts

Results 1 - 25 of 358

Muffler, 40 Series, 2 1/2 in. Offset Inlet, 2 1/2 in. Offset Outlet, Chambered, Steel, Black, Each

Part Number: FLO-42543

4.91 out of 5 stars ( 44 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, American Thunder 40 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Steel, Black, Each

Part Number: FLO-42541

4.75 out of 5 stars ( 88 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Delta Flow 50 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Steel, Black, Each

Part Number: FLO-942551

4.85 out of 5 stars ( 39 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Flowmaster 40 Series, 3 in. Offset Inlet/3 in. Center Outlet, Steel, Black, Each

Part Number: FLO-43041

4.83 out of 5 stars ( 48 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Super 40 Series, 3 in. Inlet/3 in. Outlet, Steel, Black, Each

Part Number: FLO-953045

5.0 out of 5 stars ( 13 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Super 40 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Steel, Black, Each

Part Number: FLO-952545

5.0 out of 5 stars ( 16 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Delta Force One Chamber, 4 in. Inlet/4 in. Outlet, Steel, Black, Each

Part Number: FLO-954010-12

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, American Thunder 40 Series, 2 1/4 in. Inlet/2 1/4 in. Outlet, Steel, Black, Each

Part Number: FLO-42441

4.88 out of 5 stars ( 33 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Delta Flow 50 Series, 3 in. Inlet/3 in. Outlet, Steel, Black, Each

Part Number: FLO-943050

4.48 out of 5 stars ( 40 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Delta Force One Chamber, 2 1/2 in. Inlet/2 1/2 in. Outlet, Steel, Black, Each

Part Number: FLO-325108

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Delta Force One Chamber, 3 in. Inlet/3 in. Outlet, Steel, Black, Each

Part Number: FLO-9430119

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, 80 Series, Crossflow, Internal Chamber, Dual Style, 2 1/2 in. Inlet/Outlet Each End, 18 x 9 3/4 x 4 in. Oval Case, Steel, Black, GM, Each

Part Number: FLO-42582

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Super 44 Series, 3 in. Inlet/3 in. Outlet, Steel, Black, Each

Part Number: FLO-943045

4.75 out of 5 stars ( 52 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Super 40 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Steel, Black, Each

Part Number: FLO-952548

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Delta Force One Chamber, 3 in. Inlet/3 in. Outlet, Steel, Black, Each

Part Number: FLO-9430109

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Delta Flow 50 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Stainless Steel, Black, Each

Part Number: FLO-842551

4.54 out of 5 stars ( 24 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Super 40 Series, Oval, Stainless, Offset 2.5 in. Inlet, Center 2.5 in. Outlet, 13.5 in. Case Length

Part Number: FLO-852546

5.0 out of 5 stars ( 10 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Super 40 Series, 3 in. Inlet/3 in. Outlet, Steel, Black, Each

Part Number: FLO-953046

5.0 out of 5 stars ( 12 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Super 44 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Steel, Black, Each

Part Number: FLO-942546

4.67 out of 5 stars ( 54 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Delta Flow 50 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Steel, Black, Each

Part Number: FLO-942552

4.86 out of 5 stars ( 22 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Super 44 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Stainless Steel, Black, Each

Part Number: FLO-842546

4.71 out of 5 stars ( 17 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Super 40 Series, Oval, Stainless, Offset 2.5 in. Inlet/Outlet, 13.5 in. Case Length, Each

Part Number: FLO-852548

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Super 40 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Steel, Black, Each

Part Number: FLO-952546

4.81 out of 5 stars ( 16 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Super 40 Series Delta Flow, Oval, Stainless, Black, 3.5 in. Offset Inlet/Outlet, Chevy, Ford, Ram

Part Number: FLO-853548

4.43 out of 5 stars ( 14 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Muffler, Super 40 Series, 3 in. Inlet/3 in. Outlet, Steel, Black, Each

Part Number: FLO-953047

4.79 out of 5 stars ( 14 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air