Availability
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.
Showing In Stock Items. Show All 384 Items.
Muffler, 40 Series, 2 1/2 in. Offset Inlet, 2 1/2 in. Offset Outlet, Chambered, Steel, Black, Each
Part Number: FLO-42543
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
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