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Flowmaster

Flowmaster High-Flow Performance Mufflers

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 11 Items.

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Results 1 - 9 of 9

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53070

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53070

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53070

Muffler, Big Block II 70 Series, 3 in. Inlet/3 in. Outlet, Steel, Black, Each

Part Number: FLO-53070

4.65 out of 5 stars ( 23 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53071

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53071

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53071

Muffler, Big Block II 70 Series, 3 in. Inlet/3 in. Outlet, Steel, Black, Each

Part Number: FLO-53071

4.53 out of 5 stars ( 19 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Flowmaster 70 Series Big Block II 409 Stainless Steel 3 Inch Muffler 853072

Flowmaster 70 Series Big Block II 409 Stainless Steel 3 Inch Muffler 853072

Flowmaster 70 Series Big Block II 409 Stainless Steel 3 Inch Muffler 853072

Muffler, 70 Series Big Block II, Oval, Stainless, 3 in. Center Inlet, 3 in. Offset Outlet, 22 in. Case Length

Part Number: FLO-853072

4.67 out of 5 stars ( 27 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Flowmaster 70 Series Big Block II Steel 2.25 Inch Muffler 524703

Flowmaster 70 Series Big Block II Steel 2.25 Inch Muffler 524703

Flowmaster 70 Series Big Block II Steel 2.25 Inch Muffler 524703

Muffler, Big Block II 70 Series, Dual 2 1/4 in. Inlet/3 in. Outlet, Steel, Black, Each

Part Number: FLO-524703

4.54 out of 5 stars ( 13 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 530702

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 530702

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 530702

Muffler, Big Block II 70 Series, 3 in. Inlet/Dual 2 1/2 in. Outlet, Steel, Black, Each

Part Number: FLO-530702

4.7 out of 5 stars ( 10 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Flowmaster 70 Series Big Block II Steel 2.5 Inch Muffler 52572

Flowmaster 70 Series Big Block II Steel 2.5 Inch Muffler 52572

Flowmaster 70 Series Big Block II Steel 2.5 Inch Muffler 52572

Muffler, Big Block II 70 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Steel, Black, Steel, Each

Part Number: FLO-52572

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Apr 8, 2026 if ordered today

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Estimated Ship Date: Apr 8, 2026 if ordered today

Flowmaster 70 Series Big Block II Steel 2.5 Inch Muffler 52573

Flowmaster 70 Series Big Block II Steel 2.5 Inch Muffler 52573

Flowmaster 70 Series Big Block II Steel 2.5 Inch Muffler 52573

Muffler, Big Block II 70 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Steel, Black, Each

Part Number: FLO-52573

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Flowmaster 70 Series Big Block II Steel 2.5 Inch Muffler 52571

Flowmaster 70 Series Big Block II Steel 2.5 Inch Muffler 52571

Flowmaster 70 Series Big Block II Steel 2.5 Inch Muffler 52571

Muffler, Big Block II 70 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Steel, Black, Each

Part Number: FLO-52571

4.89 out of 5 stars ( 9 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53072

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53072

Flowmaster 70 Series Big Block II Steel 3 Inch Muffler 53072

Muffler, Big Block II 70 Series, 3 in. Inlet/3 in. Outlet, Steel, Black, Each

Part Number: FLO-53072

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

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