Description
Overview
The Flowmaster Exhaust Muffler brings proven 40 Series Delta Flow technology to your build, delivering an aggressive yet refined tone that street and strip enthusiasts trust. Engineered with a two-chamber design and Flowmaster’s signature Delta Flow deflectors, this performance exhaust muffler is built to move air efficiently while keeping interior resonance in check. Whether you’re upgrading a daily driver or dialing in a weekend car, it’s a durable, high-value centerpiece for any exhaust system.
Delta Flow Performance
At the heart of this muffler is Flowmaster’s Delta Flow® technology. The internal Delta deflectors generate increased scavenging for stronger performance and reduced interior sound. Compared to the standard 40 Series, this design produces a milder exterior tone and less interior resonance — giving you the aggressive sound level Flowmaster is known for without overwhelming cabin drone. It’s the kind of tuned character that makes a car exhaust feel purpose-built.
Built to Last
Construction is where this Flowmaster muffler proves its worth. It’s made from 16 gauge aluminized steel and fully MIG welded for maximum durability, then finished in high-temperature paint to stand up to the heat and abuse of a working exhaust automobile setup. This is a muffler engineered to survive the demands of street and strip driving season after season.
- 40 Series Delta Flow two-chamber design with Delta deflectors for increased scavenging
- Aggressive sound level with a milder exterior tone and reduced interior resonance versus the standard 40 Series
- 16 gauge aluminized steel body, fully MIG welded for maximum durability
- 3.00″ inlet diameter
- High-temperature paint finish
- Universal fitment for flexible custom exhaust system builds
- Street/Strip vehicle type; Emission Code 5
Fitment & Configuration
This is a universal-fit muffler, making it a versatile choice when you shop for exhaust components to complete a custom cat back exhaust system or a full performance exhaust build. It features a 3.00″ inlet diameter and mounts using new hangers (not included), so plan your install hardware accordingly. Exhaust tips are sold separately, giving you the freedom to finish the look exactly the way you want. As with any muffler or mufflers used in a catback exhaust or cat back muffler system, confirm your routing and clearances before installation.
If you’ve been comparing MagnaFlow exhaust and MagnaFlow muffler options against the competition, the Flowmaster 40 Series Delta Flow delivers a distinctly aggressive character backed by rugged aluminized steel construction. It’s an ideal building block whether you’re piecing together a cat back exhaust system, replacing a worn muffler, or upgrading to a true performance exhaust that both sounds and works the part.
