Description
Overview
The Flowmaster 40 Series Chambered Muffler is the muffler that built the legend — the original, unmistakable Flowmaster sound in a rugged, race-proven package. If you’re chasing that classic aggressive tone that put the Flowmaster company on the map, the Original 40 Series delivers it both inside and outside the cab. This is the Flowmaster muffler enthusiasts reach for when they want a bold, no-apologies exhaust note.
Engineered as a chambered performance muffler, the 40 Series produces an aggressive exterior and interior tone that announces your build the moment you fire it up. Whether you’re upgrading a daily driver or building out a full Flowmaster exhaust system, this car muffler brings the deep, powerful character that made the 40 Series a benchmark among performance mufflers.
Built to Last
Durability is engineered into every seam. The 40 Series is constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability, so it stands up to heat, road abuse, and years of service. A high-temperature paint finish adds another layer of protection against the elements, keeping your exhaust muffler looking and performing its best mile after mile.
Key Benefits
- Delivers the original, aggressive Flowmaster sound — inside and out
- 16 gauge 409S stainless steel construction, fully MIG welded for maximum durability
- High-temperature paint finish for long-lasting protection
- Chambered design tuned for that signature deep, aggressive tone
- Universal fitment for flexible truck and SUV installs
- 2.25″ inlet diameter with a 9.50″ body width
Fitment & Installation
This is a universal-fit muffler designed for Truck/SUV applications, giving you the flexibility to integrate it into a custom exhaust setup or as a direct replacement exhaust muffler for your car or truck. It features a 2.25″ inlet diameter and a 9.50″ body width, with an Emission Code of 5. The muffler uses new hangers (not included), so plan to source the appropriate mounting hardware for your install. Exhaust tips are sold separately, letting you finish the system exactly the way you want.
As a universal exhaust muffler, the 40 Series is a natural building block for a complete Flowmaster exhaust system. Pair it with your preferred piping and tips to dial in both the look and the sound of your vehicle.
The Original 40 Series
When people picture the classic Flowmaster 40 sound, this is the muffler they’re hearing. If you want that unmistakable Flowmaster exhaust character with proven stainless-steel construction, the Original 40 Series performance muffler is the one to choose. Please note this product carries a California Proposition 65 warning.
