Description
Overview
The Flowmaster Flow FX Exhaust Muffler brings show-quality performance and a distinctive tone to large displacement gas engines. As part of Flowmaster’s Flow FX series, this muffler is engineered for the enthusiast who wants a moderate performance sound that stands apart from the traditional “chambered” muffler note. With a 4.0-inch inlet and outlet paired to a compact 6-inch diameter body, it strikes the balance between aggressive flow and clean, manageable packaging under the vehicle.
At the heart of this Flowmaster muffler is a large 4.0-inch “straight-through” stainless steel perforated core, wrapped in high-temperature sound absorption materials. That construction delivers a deep, traditional, mellow tone while keeping the sound level moderate — an ideal choice for drivers building a performance exhaust system that sounds refined rather than raspy. Whether you’re upgrading a truck or a large-engine car exhaust, the Flow FX core is designed to move air efficiently.
Key Benefits
Flow FX mufflers are built for people who want a premium look without an inflated price. The case is fully MIG-welded from “bright” 409 stainless steel, and the Flow FX logo is embossed on both sides for a finished, show-quality appearance. The internal flow design is reversible, so the muffler can be installed in either direction to best suit your vehicle application — a practical advantage when planning a catback exhaust or cat back muffler system layout.
- Straight-through 4.0-inch stainless steel perforated core for strong flow
- High-temperature sound absorption material for a deep, mellow, moderate tone
- Fully MIG-welded 409 stainless steel construction with embossed Flow FX logos on both sides
- Reversible internal design installs in either direction for flexible fitment
- Compact 6-inch diameter, 6-inch body height case for easy packaging
- 4.0-inch inlet and outlet inside diameter (4.13-inch outside diameter)
Specifications
Body Height: 6.00 in. | Body Diameter: 6.00 in. | Inlet Inside Diameter: 4.00 in. | Inlet Outside Diameter: 4.13 in. | Outlet Inside Diameter: 4.00 in. | Outlet Outside Diameter: 4.13 in. | Sound Level: Moderate | Emission Code: 5 | Category: Exhaust. Exhaust tips are sold separately, letting you finish the system to your taste. California Proposition 65 Warning applies.
Fitment
With its 4.0-inch inlet and outlet and 6-inch straight-through body, this Flowmaster muffler is a great match for large displacement gas engines. If you’re ready to shop for exhaust upgrades and want a Magnaflow-alternative performance muffler that pairs a compact case with a deep traditional tone, the Flow FX delivers the sound, flow, and finish enthusiasts expect. Add it to a cat back exhaust system or use it as a direct muffler replacement to transform your exhaust automobile setup.
