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Flowmaster

Flowmaster 70 Series Big Block II Mufflers

4.69 out of 5 stars 124 Customer Reviews

These 70 Series Big Block II mufflers are designed around a large case for maximum volume and efficiency. They're 2 in. narrower than the original Big Block muffler, making them easier to install into tight areas. Other features include a mild, mellow exhaust tone and a resonant tuning chamber for reduced interior sound levels.

Showing In Stock Items. Show All 4 Items.

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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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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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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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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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