Description
Overview
The Flowmaster 40 Series Delta Flow Chambered Muffler delivers the aggressive, unmistakable Flowmaster sound street and strip enthusiasts have come to expect, built around a proven two-chamber design. At the heart of this muffler is Flowmaster’s Delta Flow® technology, which uses precisely engineered Delta deflectors to generate increased exhaust scavenging. The result is stronger performance flow paired with a more refined character than a standard 40 Series, giving you serious tone without an overwhelming cabin drone.
Key Benefits
Where the classic 40 Series is known for its bold volume, this Delta Flow version dials in a milder exterior tone and noticeably reduced interior resonance. That makes it an ideal choice if you want an aggressive exhaust note that still keeps highway cruising comfortable. The Delta deflectors improve scavenging to help evacuate spent gases more efficiently, supporting better performance while calming the harsh frequencies that can make some chambered mufflers fatiguing on long drives.
Durability is engineered in from the start. The muffler is constructed from 16 gauge 409S stainless steel and fully MIG welded, so it’s built to stand up to heat cycling, road exposure, and the demands of a hard-driven street or strip vehicle. A high-temperature paint finish adds an extra layer of protection against the elements and underbody heat.
Highlights
- Delta Flow® two-chamber design with Delta deflectors for increased scavenging and better performance
- Aggressive sound level with a milder exterior tone and reduced interior resonance versus the standard 40 Series
- Rugged 16 gauge 409S stainless steel construction, fully MIG welded for maximum durability
- High-temperature paint finish for lasting protection
- 2.50″ inlet diameter
- Universal fitment for flexible custom exhaust builds
Sound & Performance
Tuned for a Street/Strip vehicle type, this muffler splits the difference between raw attitude and everyday livability. The chambered architecture produces that signature Flowmaster growl under throttle, while the Delta Flow refinements keep interior sound in check so you can enjoy the tone without constant resonance. It’s a smart upgrade for anyone chasing a purposeful exhaust note with the flow characteristics to match.
Fitment & Installation
This is a universal muffler with a 2.50″ inlet diameter, making it a versatile foundation for a custom or replacement exhaust system. It mounts using new hangers, which are not included, so plan your installation hardware accordingly. Exhaust tips are sold separately, giving you the freedom to finish the system exactly the way you want. Please note this product carries a California Proposition 65 warning and is assigned Emission Code 5.
Verify your exhaust dimensions and routing before ordering to ensure the 2.50″ inlet and universal design suit your application.
