Description
Overview
The Flowmaster 40 Series Delta Flow Chambered Muffler brings race-inspired sound and proven performance to your late model muscle car. Built around Flowmaster’s Delta Flow® technology, this two-chamber muffler uses precision-engineered Delta deflectors to generate increased scavenging for better exhaust flow while taming the harsh resonance that plagues lesser mufflers. The result is an aggressive exterior tone paired with a cleaner, more livable interior sound over the standard 40 Series.
Whether you’re upgrading a factory system or building a custom exhaust from the ground up, this universal-fit muffler is engineered to deliver the deep, muscular note Flowmaster is known for. The 2.25-inch inlet feeds into a two-chamber design, with an offset outlet located on the same side for straightforward routing in a variety of applications.
Key Benefits
Delta Flow® technology sets this muffler apart. The internal Delta deflectors work to increase exhaust scavenging, promoting stronger flow and improved performance, while simultaneously reducing interior sound and cabin drone. Compared to the standard 40 Series, you get a milder exterior tone and noticeably reduced interior resonance — the ideal balance for drivers who want an aggressive presence without an exhausting daily drive.
Durability is built into every seam. Constructed from 16-gauge aluminized steel and fully MIG welded, this muffler is made to stand up to the heat, vibration, and long-term abuse of a performance exhaust system. A high-temperature paint finish adds another layer of protection against the elements and the extreme temperatures generated at the muffler.
Highlights
- Delta Flow® two-chamber design with internal Delta deflectors for increased scavenging
- Aggressive exterior tone with reduced interior sound and resonance versus the standard 40 Series
- 16-gauge aluminized steel construction, fully MIG welded for maximum durability
- High-temperature paint finish for lasting protection
- 2.25-inch inlet with offset (same-side) outlet for flexible routing
- Emission Code 5
Fitment & Installation
This is a universal-fit muffler designed for late model muscle car applications and custom exhaust builds. It mounts using new hangers, which are not included, so plan your installation accordingly. Exhaust tips are sold separately, giving you the freedom to finish your system with the look you want. Because fitment is universal, verify inlet and outlet dimensions and clearances against your vehicle’s exhaust routing before installation.
For enthusiasts chasing the signature Flowmaster growl with a smarter balance of performance and comfort, the 40 Series Delta Flow delivers proven chambered technology in a rugged, ready-to-run package. Choose the configuration that fits your build and give your late model muscle car the aggressive voice it deserves.
