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Summit Racing SpeedCard - learn how to get 10% back up to $100

Save Now on Winter Essentials for Your Ride!

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Flowmaster

Flowmaster High-Flow Performance Mufflers

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Equip your ride with Flowmaster performance mufflers, a proven choice for classic and modern muscle cars, street rods, heavy-duty towing, and high-performance racing...

Equip your ride with Flowmaster performance mufflers, a proven choice for classic and modern muscle cars, street rods, heavy-duty towing, and high-performance racing applications. Designed for unrestricted exhaust flow, the mufflers deliver real performance gains along with the muscular sound Flowmaster is known for. Multiple high-flow internal designs—including chambered mufflers, exclusive laminar-flow technology, straight-through performance mufflers, and race mufflers—make it easy to outfit your ride with the sound and performance you want. Built from MIG-welded aluminized steel or stainless steel for long-lasting...

Equip your ride with Flowmaster performance mufflers, a proven choice for classic and modern muscle cars, street rods, heavy-duty towing, and high-performance racing applications. Designed for unrestricted exhaust flow, the mufflers deliver real performance gains along with the muscular sound Flowmaster is known for. Multiple high-flow internal designs—including chambered mufflers, exclusive laminar-flow technology, straight-through performance mufflers, and race mufflers—make it easy to outfit your ride with the sound and performance you want. Built from MIG-welded aluminized steel or stainless steel for long-lasting durability, Flowmaster mufflers are available in a wide range of inlet and outlet locations, dimensions, and case configurations. Shop the entire selection of Flowmaster performance mufflers at Summit Racing today.

Showing In Stock Items. Show All 115 Items.

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Results 1 - 25 of 110

Flowmaster 40 Series Steel 2.5 Inch Muffler 42543

Flowmaster 40 Series Steel 2.5 Inch Muffler 42543

Flowmaster 40 Series Steel 2.5 Inch Muffler 42543

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

Flowmaster Delta Force 10 Series Steel 4 Inch Muffler 954010-12

Flowmaster Delta Force 10 Series Steel 4 Inch Muffler 954010-12

Flowmaster Delta Force 10 Series Steel 4 Inch Muffler 954010-12

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

Flowmaster Delta Force 10 Series Steel 2.5 Inch Muffler 325108

Flowmaster Delta Force 10 Series Steel 2.5 Inch Muffler 325108

Flowmaster Delta Force 10 Series Steel 2.5 Inch Muffler 325108

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

Flowmaster Delta Force 10 Series Steel 3 Inch Muffler 9430119

Flowmaster Delta Force 10 Series Steel 3 Inch Muffler 9430119

Flowmaster Delta Force 10 Series Steel 3 Inch Muffler 9430119

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

Flowmaster Delta Force 10 Series Steel 3 Inch Muffler 9430109

Flowmaster Delta Force 10 Series Steel 3 Inch Muffler 9430109

Flowmaster Delta Force 10 Series Steel 3 Inch Muffler 9430109

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

Flowmaster Super 40 Series Delta Flow Steel 3 Inch Muffler 953045

Flowmaster Super 40 Series Delta Flow Steel 3 Inch Muffler 953045

Flowmaster Super 40 Series Delta Flow Steel 3 Inch Muffler 953045

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

Flowmaster 40 Series Steel 2.5 Inch Muffler 42541

Flowmaster 40 Series Steel 2.5 Inch Muffler 42541

Flowmaster 40 Series Steel 2.5 Inch Muffler 42541

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

Flowmaster Super 40 Series Delta Flow Steel 2.5 Inch Muffler 952545

Flowmaster Super 40 Series Delta Flow Steel 2.5 Inch Muffler 952545

Flowmaster Super 40 Series Delta Flow Steel 2.5 Inch Muffler 952545

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

Flowmaster 80 Series Crossflow Steel 2.5 Inch Muffler 42582

Flowmaster 80 Series Crossflow Steel 2.5 Inch Muffler 42582

Flowmaster 80 Series Crossflow Steel 2.5 Inch Muffler 42582

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

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 2.5 Inch Muffler 852546

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 2.5 Inch Muffler 852546

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 2.5 Inch Muffler 852546

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

Flowmaster Super 40 Series Delta Flow Steel 2.5 Inch Muffler 952548

Flowmaster Super 40 Series Delta Flow Steel 2.5 Inch Muffler 952548

Flowmaster Super 40 Series Delta Flow Steel 2.5 Inch Muffler 952548

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

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 3.5 Inch Muffler 853548

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 3.5 Inch Muffler 853548

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 3.5 Inch Muffler 853548

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

Flowmaster Super 40 Series Delta Flow Steel 3 Inch Muffler 953047

Flowmaster Super 40 Series Delta Flow Steel 3 Inch Muffler 953047

Flowmaster Super 40 Series Delta Flow Steel 3 Inch Muffler 953047

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

Flowmaster FlowFX Active Dual Mode 409 Stainless Steel 3 Inch Muffler 717900

Flowmaster FlowFX Active Dual Mode 409 Stainless Steel 3 Inch Muffler 717900

Flowmaster FlowFX Active Dual Mode 409 Stainless Steel 3 Inch Muffler 717900

Muffler, FlowEx Dual Mode, Direct Fit, Wireless Active Valve, One Turn-Down Tip, 409 Stainless Steel, Dodge, Ram, 1500, 5.7L, Kit

Part Number: FLO-717900

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

Flowmaster Super 40 Series Delta Flow Steel 3 Inch Muffler 953046

Flowmaster Super 40 Series Delta Flow Steel 3 Inch Muffler 953046

Flowmaster Super 40 Series Delta Flow Steel 3 Inch Muffler 953046

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

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 2.5 Inch Muffler 852548

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 2.5 Inch Muffler 852548

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 2.5 Inch Muffler 852548

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

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 3 Inch Muffler 853046

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 3 Inch Muffler 853046

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 3 Inch Muffler 853046

Muffler, Super 40 Series, Oval, Stainless, Offset 3.0 in. Inlet, Center 3.0 in. Outlet, 13.5 in. Case Length

Part Number: FLO-853046

Not Yet Reviewed

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

Flowmaster Super 40 Series Delta Flow Steel 2.5 Inch Muffler 952546

Flowmaster Super 40 Series Delta Flow Steel 2.5 Inch Muffler 952546

Flowmaster Super 40 Series Delta Flow Steel 2.5 Inch Muffler 952546

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

Flowmaster Super 40 Series Delta Flow Steel 2.5 Inch Muffler 952547

Flowmaster Super 40 Series Delta Flow Steel 2.5 Inch Muffler 952547

Flowmaster Super 40 Series Delta Flow Steel 2.5 Inch Muffler 952547

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

Part Number: FLO-952547

4.2 out of 5 stars ( 5 )

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

Flowmaster 50 Series Delta Flow Steel 2.5 Inch Muffler 942551

Flowmaster 50 Series Delta Flow Steel 2.5 Inch Muffler 942551

Flowmaster 50 Series Delta Flow Steel 2.5 Inch Muffler 942551

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

Flowmaster 40 Series Steel 3 Inch Muffler 43041

Flowmaster 40 Series Steel 3 Inch Muffler 43041

Flowmaster 40 Series Steel 3 Inch Muffler 43041

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

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 3 Inch Muffler 853048

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 3 Inch Muffler 853048

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 3 Inch Muffler 853048

Muffler, Super 40 Series, Oval, Stainless, Offset 3.0 in. Inlet/Outlet, 13.5 in. Case Length, Each

Part Number: FLO-853048

4.17 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

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 3 Inch Muffler 8530452

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 3 Inch Muffler 8530452

Flowmaster Super 40 Series Delta Flow 409 Stainless Steel 3 Inch Muffler 8530452

Muffler, Super 40 Series, Oval, Stainless, Single Center 3.0 in. Inlet, Dual Offset 2.5 in. Outlets, Each

Part Number: FLO-8530452

4.63 out of 5 stars ( 8 )

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

Flowmaster Super 40 Series Delta Flow Steel 3 Inch Muffler 953049

Flowmaster Super 40 Series Delta Flow Steel 3 Inch Muffler 953049

Flowmaster Super 40 Series Delta Flow Steel 3 Inch Muffler 953049

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

Part Number: FLO-953049

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

Flowmaster Super 40 Series Delta Flow Steel 2.25 Inch Muffler 952445

Flowmaster Super 40 Series Delta Flow Steel 2.25 Inch Muffler 952445

Flowmaster Super 40 Series Delta Flow Steel 2.25 Inch Muffler 952445

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

Part Number: FLO-952445

4.6 out of 5 stars ( 5 )

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

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