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Flowmaster

Flowmaster 50 Series Heavy-Duty Mufflers

4.47 out of 5 stars 32 Customer Reviews

Flowmaster 50 Series heavy-duty mufflers can deliver more horsepower and increase torque and fuel mileage. Specifically designed for gas and diesel applications, the 50 Series heavy-duty mufflers can significantly improve acceleration and towing power while also increasing fuel economy.

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Flowmaster 50 Series Heavy-Duty 409 Stainless Steel 2.5 Inch Muffler 8525554

Flowmaster 50 Series Heavy-Duty 409 Stainless Steel 2.5 Inch Muffler 8525554

Flowmaster 50 Series Heavy-Duty 409 Stainless Steel 2.5 Inch Muffler 8525554

Muffler; 50 Series Heavy Duty Muffler; 2.5 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 10 in.

Part Number: FLO-8525554

3.9 out of 5 stars ( 10 )

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Flowmaster 50 Series Heavy-Duty 409 Stainless Steel 3.5 Inch Muffler 853558

Flowmaster 50 Series Heavy-Duty 409 Stainless Steel 3.5 Inch Muffler 853558

Flowmaster 50 Series Heavy-Duty 409 Stainless Steel 3.5 Inch Muffler 853558

Muffler, 50 Series Heavy-Duty, Oval, Stainless, Black, 3.5 in. Offset Inlet/Outlet, 18 in. Case Length, Each

Part Number: FLO-853558

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

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