Description
Overview
The Flowmaster 40 Series Delta Flow Chambered Muffler delivers the deep, aggressive exhaust note performance enthusiasts demand while introducing smarter internal engineering for a more refined driving experience. Built around a proven two-chamber design, this muffler incorporates Flowmaster’s Delta Flow® technology to make the most of every pulse of exhaust gas. The result is a street/strip-ready muffler that sounds mean on the outside without punishing you inside the cabin.
Delta Flow Technology
At the heart of this muffler are Flowmaster’s Delta deflectors, which generate increased scavenging for better performance and reduced interior sound. Compared to a standard 40 Series, this Delta Flow version offers a milder exterior tone and noticeably reduced interior resonance, taming the drone and boom that can wear on you during long drives and highway cruising. You still get the aggressive attitude the 40 Series is known for, just with more livability behind the wheel.
Built to Last
Durability is engineered in from the start. The muffler is constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability, giving it the strength to withstand the heat, vibration, and demands of both street and strip use. A high-temperature paint finish helps the housing stand up to the elements and the extreme temperatures exhaust systems endure.
Key Highlights
- Two-chamber design with Delta Flow® technology for improved scavenging and performance
- Delta deflectors reduce interior sound and resonance versus the standard 40 Series
- Aggressive exterior sound level tuned for street/strip vehicles
- 16 gauge aluminized steel construction, fully MIG welded
- Durable high-temperature paint finish
- 2.25″ inlet diameter with universal fitment
Fitment & Configuration
This is a universal-fit muffler with a 2.25″ inlet diameter, making it a versatile choice for a wide range of custom and replacement exhaust builds. Because it’s designed for street/strip applications, it’s a great match for enthusiasts who want a bold, performance-oriented sound without sacrificing everyday drivability. Please note that exhaust tips are sold separately, so you can pair the muffler with the tip style that best suits your setup. The muffler carries an emission code of 5.
Whether you’re building a weekend cruiser or a dedicated street/strip machine, the Flowmaster 40 Series Delta Flow Chambered Muffler brings together the aggressive tone, refined interior comfort, and rugged construction that make it a smart upgrade for your exhaust system. Choose it when you want proven Flowmaster performance and a durable, race-inspired build that’s ready to work.
