Description
Overview
The Flowmaster 40 Series Delta Flow Chambered Muffler delivers the signature aggressive Flowmaster sound with the added refinement of Delta Flow® technology. Built as a two-chamber design, this muffler is engineered to move exhaust gases efficiently while producing the deep, muscular tone that street and strip enthusiasts demand. It’s a proven upgrade for drivers who want serious presence under the hood without sacrificing durability.
Delta Flow Technology
At the heart of this muffler is Flowmaster’s Delta Flow® design. The internal Delta deflectors generate increased scavenging for better performance, while simultaneously reducing interior sound. Compared to the standard 40 Series, this Delta Flow version delivers a milder exterior tone and reduced interior resonance—giving you an aggressive exhaust note that stays enjoyable on longer drives and highway cruising.
Built to Last
Constructed from 16-gauge aluminized steel and fully MIG welded, this muffler is designed for maximum durability and long service life. A high-temperature paint finish helps protect the exterior against the heat and elements that come with performance exhaust use. This is a component built to handle the demands of a hard-working street/strip vehicle.
Key Highlights
- Two-chamber design with Delta Flow® technology for improved scavenging and performance
- Aggressive sound level with a milder exterior tone than the standard 40 Series
- 16-gauge aluminized steel construction, fully MIG welded for maximum durability
- 3.00-inch inlet diameter with dual outlet location
- High-temperature paint finish for lasting protection
- Universal fitment for flexible installation across street/strip applications
Fitment & Configuration
This is a universal-fit muffler featuring a 3.00-inch inlet diameter and a dual outlet location, making it a versatile choice for a wide range of custom and performance exhaust builds. Because it’s a universal component, it mounts using new hangers (not included), so plan your installation accordingly. Exhaust tips are sold separately, allowing you to finish the system exactly how you want.
Whether you’re upgrading a daily driver or dialing in a dedicated street/strip machine, the 40 Series Delta Flow strikes a balance between attitude and refinement. You get the unmistakable Flowmaster growl outside, paired with reduced resonance inside the cabin—the best of both worlds for enthusiasts who want their vehicle to sound as strong as it performs.
Carrying an emission code of 5, this muffler is a smart addition for those building a performance exhaust setup. Combine it with your choice of piping, hangers, and tips to create a complete system tailored to your vehicle and your preferred sound profile.
