Description
Overview
The Flowmaster 40 Series Chambered Muffler is the muffler that built the reputation of the Flowmaster company, delivering the deep, aggressive tone that made the brand a household name among muscle car enthusiasts. If you’re chasing that unmistakable original Flowmaster sound, this performance muffler is engineered to give you an aggressive exterior and interior tone that announces your build the moment you fire it up.
Built as part of the Original 40 Series, this exhaust muffler uses Flowmaster’s chambered technology to produce a bold, race-inspired note without add-on resonators or packing that can burn out over time. It’s a true performance muffler designed for drivers who want their classic muscle car to look and, more importantly, sound the part.
Built to Last
Constructed of 16 gauge 409S stainless steel and fully MIG welded, the Flowmaster 40 Series muffler is engineered for maximum durability under real-world heat and vibration. A high-temperature paint finish adds an extra layer of protection, helping this exhaust muffler car component hold up to the demanding conditions of a hard-driven muscle car.
Key Highlights
- Original 40 Series chambered design for that classic, aggressive Flowmaster exhaust tone
- 16 gauge 409S stainless steel body, fully MIG welded for maximum durability
- High-temperature paint finish for added heat and corrosion protection
- 2.50″ inlet diameter with a 9.50″ body width
- Universal fitment ideal for classic muscle car applications
- Aggressive sound level, both inside and outside the vehicle
Fitment & Installation
This flowmaster muffler features a 2.50″ inlet diameter and a 9.50″ body width, and its universal design makes it a versatile choice when planning or upgrading a flowmaster exhaust system on a classic muscle car. The mount type uses new hangers (not included), so plan your installation hardware accordingly. Exhaust tips are sold separately, giving you the freedom to finish your setup exactly how you want it.
Whether you’re piecing together a complete flowmaster exhaust system or simply swapping in a genuine flowmaster 40 to reclaim that signature growl, the 40 Series delivers the tone and toughness that performance mufflers are judged by. It’s the car muffler that turned a specification sheet into a legend, and it remains a benchmark for exhaust muffler performance and sound.
Warning: This product carries a California Proposition 65 warning. Emission Code: 5.
Choose the Flowmaster 40 Series when you want a proven flowmaster exhaust muffler engineered around durable materials, a distinctly aggressive character, and the heritage that makes Flowmaster exhaust systems the standard so many enthusiasts build around.
