Description
Overview
The Flowmaster 40 Series Delta Flow Chambered Muffler brings proven two-chamber performance and Flowmaster’s signature aggressive sound to your build. Engineered with Delta Flow® technology, this muffler uses precisely positioned Delta deflectors to generate increased exhaust scavenging, helping your engine breathe more efficiently for better performance while taming interior drone. It’s a straightforward upgrade for enthusiasts who want a serious exhaust note without the overwhelming cabin resonance of a traditional straight chambered design.
Compared to the standard 40 Series, this Delta Flow version delivers a milder exterior tone and reduced interior resonance, striking a balance between an aggressive presence and everyday livability. If you want your late model muscle car to sound purposeful on the street and at wide-open throttle, this two-chamber design was built for exactly that.
Built to Last
Durability is engineered into every seam. The muffler body is constructed from 16 gauge 409S stainless steel and fully MIG welded, giving it the strength and corrosion resistance to stand up to heat cycling, road grime, and the demands of a hard-driven exhaust system. A high-temperature paint finish adds an extra layer of protection against the elements and keeps the muffler looking clean under the car.
Key Benefits
- Delta Flow® two-chamber design with Delta deflectors for increased scavenging and better performance
- Aggressive exhaust tone with reduced interior sound and resonance
- Milder exterior tone and less cabin drone than the standard 40 Series
- 16 gauge 409S stainless steel construction, fully MIG welded for maximum durability
- High-temperature paint finish for lasting protection
- 2.50-inch inlet diameter
Fitment & Configuration
This is a universal-fit muffler with a 2.50-inch inlet diameter, making it a versatile choice for custom and replacement exhaust work on late model muscle cars. Because it is a universal application, it mounts using new hangers, which are not included, so plan your installation accordingly. Exhaust tips are sold separately, letting you finish the system exactly the way you want.
As you plan your build, verify that the 2.50-inch inlet and universal dimensions work with your intended exhaust routing. Pairing this muffler with the right hangers and tips gives you the freedom to dial in both the fit and the final look of your exhaust.
Please note this product carries a California Proposition 65 warning. With its combination of proven Delta Flow® performance, aggressive-yet-refined sound, and rugged stainless steel construction, the Flowmaster 40 Series Delta Flow Chambered Muffler is a smart foundation for your next exhaust upgrade.
