Description
Overview
The Flowmaster 40 Series Delta Flow Chambered Muffler brings proven Delta Flow® technology to your build with an aggressive, race-inspired tone that has made the 40 Series a staple of the performance world. Built around a two-chamber design, this muffler uses Flowmaster’s Delta deflectors to generate increased scavenging for better performance while taming interior resonance, giving you a muffler that sounds serious without overwhelming the cabin.
Compared to a standard 40 Series, this Delta Flow version delivers a milder exterior tone and reduced interior resonance, making it an ideal upgrade for drivers who want deep, aggressive exhaust character that stays livable on the street and highway. It’s a smart choice for classic muscle car owners chasing that unmistakable Flowmaster growl.
Built to Last
Durability is engineered in from the start. This muffler is constructed of 16 gauge aluminized steel and fully MIG welded, so it stands up to heat, vibration, and the demands of a hard-driven exhaust system. A high-temperature paint finish helps protect the housing against the elements and the extreme temperatures generated under any performance application.
Key Highlights
- Delta Flow® two-chamber design with Delta deflectors for increased scavenging and better performance
- Aggressive sound level with milder exterior tone and reduced interior resonance versus standard 40 Series
- 16 gauge aluminized steel construction, fully MIG welded for maximum durability
- High-temperature paint finish for lasting protection
- 3.00″ inlet diameter with dual outlet configuration
- Universal fitment, ideal for classic muscle car builds
Fitment & Configuration
This muffler features a 3.00-inch inlet diameter and a dual outlet location, giving you flexibility in how you route and terminate your exhaust system. As a universal-fit component, it’s designed to integrate into a wide range of custom and classic muscle car exhaust setups, letting fabricators and enthusiasts dial in the exact configuration their project calls for. Exhaust tips are sold separately, so you can finish the system with the look that matches your vehicle.
Whether you’re refreshing the exhaust on a weekend cruiser or building a street machine that demands to be heard, the 40 Series Delta Flow delivers the balance of aggressive tone, smart engineering, and rugged construction that the Flowmaster name is known for. Choose the setup that fits your build and enjoy a proven performance muffler that backs its sound with real scavenging technology.
The combination of Delta Flow® deflectors, chambered design, and heavy-duty MIG-welded aluminized steel makes this a dependable core for any performance exhaust. Pair it with the exhaust tips of your choice and complete your system with confidence.
