Description
Overview
The Flowmaster Flow FX Exhaust Muffler is engineered for the enthusiast who wants a moderate, deep, and mellow exhaust note that stands apart from the traditional “chambered” muffler sound. Built as part of Flowmaster’s Flow FX series, this muffler pairs show-quality construction with an economical price point, making it an easy upgrade for anyone looking to shop for exhaust that improves both tone and appearance. With a compact 5-inch diameter body and a 3.0-inch straight-through design, it’s an excellent match for large displacement gas engines that demand real flow.
At the heart of this muffler is a large 3.0-inch “straight-through” stainless steel perforated core surrounded by high-temperature sound absorption materials. This proven internal layout delivers a deep, traditional, mellow tone while keeping restriction low, making it a smart building block for a performance exhaust setup. The internal flow design is fully reversible, so the muffler can be installed in either direction to best suit your vehicle application and packaging.
Key Benefits
Whether you’re refreshing a tired factory exhaust system or piecing together a custom cat back exhaust system, this Flowmaster muffler brings durable materials and a refined sound level to the table. The fully MIG-welded “bright” 409 stainless steel construction resists the heat and abuse of daily driving, and the Flow FX logo is embossed on both sides of the case for a clean, finished look under the vehicle.
- Moderate sound level for a deep, traditional, mellow tone — different from a chambered muffler sound
- Large 3.0-inch straight-through stainless steel perforated core for strong flow
- High-temperature sound absorption materials for a refined exhaust note
- Reversible internal flow design — install in either direction to fit your application
- Fully MIG-welded “bright” 409 stainless steel construction with embossed Flow FX logos on both sides
- Compact 5-inch diameter body, ideal for large displacement gas engines
Specifications
This muffler features a 3.00-inch inlet inside diameter (3.13-inch outside diameter) and a matching 3.00-inch outlet inside diameter (3.13-inch outside diameter), giving you consistent 3.0-inch flow from end to end. It carries an Emission Code of 5 and a moderate sound level rating. Please note that exhaust tips are sold separately, allowing you to finish the look exactly the way you want.
Why the Flow FX
For the person who wants a show quality performance muffler without overspending, the Flow FX line hits the mark. Its compact case, aggressive-yet-mellow tone, and stainless steel build make it a versatile choice for building or upgrading a car exhaust. Compare it alongside other magnaflow mufflers and cat back muffler system components, and the Flowmaster muffler delivers a distinctive character that’s hard to match at this price. California Proposition 65 Warning applies.







