Description
Overview
The Flowmaster 40 Series Delta Flow muffler delivers the aggressive, unmistakable street/strip attitude that performance drivers crave, backed by proven engineering. Built around Flowmaster’s two-chamber Delta Flow® technology, this muffler uses internal Delta deflectors to generate increased scavenging for better performance and reduced interior sound. If you’re ready to shop for exhaust hardware that balances a bold tone with real drivability, this is a serious contender for your car exhaust build.
Compared to the standard 40 Series, this design produces a milder exterior tone and reduced interior resonance, so you get the aggressive sound you want on the outside without punishing drone inside the cabin. It’s an ideal building block for a performance exhaust system, whether you’re upgrading a daily driver or dialing in a weekend street/strip machine.
Key Benefits
Durability is engineered in from the start. This muffler is constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability, then finished in high-temperature paint to hold up under the heat and abuse of a hard-working exhaust automobile setup. The result is a muffler built to survive the elements and the miles.
- Two-chamber Delta Flow® design with Delta deflectors for increased scavenging and better performance
- Milder exterior tone and reduced interior resonance versus the standard 40 Series
- Aggressive sound level tuned for street/strip use
- 16 gauge aluminized steel body, fully MIG welded for maximum durability
- High-temperature paint finish for long-term heat resistance
- 2.50-inch inlet diameter with dual outlet location
Flow, Fitment & Options
This is a universal-fit muffler with a 2.50-inch inlet diameter and a dual outlet location, giving fabricators and DIY installers flexibility when planning a cat back exhaust system or a fully custom exhaust routing. Because it’s universal, it slots into a wide range of applications where 40 Series Delta Flow performance and sound are the goal. The muffler mounts using new hangers (not included), and exhaust tips are sold separately, so you can tailor the finished look of your exhaust system to match your vehicle.
The emission code for this product is 5, and it carries a street/strip vehicle designation. Choose the components that complete your setup, add the hangers and tips that fit your application, and you have the heart of an aggressive, great-sounding performance exhaust.
Why Flowmaster
Flowmaster mufflers have earned their reputation among enthusiasts who want a purposeful, aggressive tone paired with genuine flow benefits. From catback exhaust projects to muffler swaps, the 40 Series Delta Flow brings a time-tested formula to your build. Whether you’re comparing MagnaFlow muffler options or other mufflers on the market, this Flowmaster muffler stands out for its scavenging design, rugged aluminized construction, and street-friendly sound character.
