Description
Overview
The Flowmaster 40 Series Chambered Muffler is the muffler that put the Flowmaster company on the map, delivering the deep, aggressive tone that made the brand a household name among performance and street rod enthusiasts. Built around Flowmaster’s Original 40 Series chambered design, this exhaust muffler produces a bold exterior rumble and an assertive interior tone that instantly transforms the character of your ride. If you’re chasing that unmistakable original Flowmaster sound, this is the performance muffler engineered to deliver it.
Constructed of 16 gauge aluminized steel and fully MIG welded throughout, this Flowmaster muffler is designed for maximum durability and long service life. The high-temperature paint finish helps it stand up to the heat and demands of a hard-working exhaust system, making it a dependable core component in any Flowmaster exhaust setup.
Key Benefits
As one of the most recognizable performance mufflers on the market, the 40 Series is prized for its aggressive sound level and no-nonsense chambered construction. It’s a proven choice for drivers who want their car muffler to be heard, whether the goal is a menacing idle, a throaty cruise, or a wide-open pull. This is the classic Flowmaster 40 that fans keep coming back to.
- Original 40 Series chambered design for that signature aggressive Flowmaster sound, inside and out
- Durable 16 gauge aluminized steel body, fully MIG welded for maximum strength
- High-temperature paint finish built to endure exhaust heat
- 2.25″ inlet diameter with a compact 19.00″ overall length
- Universal fitment for flexible street rod and custom exhaust muffler applications
- Emission code 5 classification
Fitment & Installation
This is a universal-fit muffler, giving fabricators and installers the freedom to integrate it into a wide range of custom and street rod exhaust muffler car builds. It features a 2.25″ inlet diameter and measures 19.00″ in overall length, keeping the footprint manageable for tight chassis routing. Please note the muffler uses new hangers, which are not included, and exhaust tips are sold separately, so you can tailor the mounting and tip configuration to your specific project.
Why the 40 Series
Few names carry the weight of Flowmaster when it comes to sound and performance. The 40 Series is the muffler that defined the aggressive Flowmaster exhaust tone, and it remains a benchmark for anyone building a serious Flowmaster exhaust system. Whether you’re finishing a fresh build or upgrading a tired factory setup, this flowmaster muffler brings proven durability and the attitude your vehicle deserves. Choose the 40 Series when you want a performance muffler that looks the part and sounds even better.
