Description
Overview
The Flowmaster 40 Series Delta Flow Chambered Muffler brings proven Delta Flow® performance to your street or strip build with an aggressive tone that muscle-car fans crave. Built around a two-chamber design, this muffler leverages Flowmaster’s signature Delta deflectors to increase exhaust scavenging, helping your engine breathe more freely while delivering a bold, race-inspired sound.
Where the standard 40 Series is known for its raw, loud character, this Delta Flow version refines the experience with a milder exterior tone and reduced interior resonance. That means you still get an unmistakably aggressive exhaust note under throttle without the constant drone that can wear on you during long highway drives. The result is a muffler that performs hard and sounds great without sacrificing everyday drivability.
Built to Last
Durability is engineered into every seam. The 40 Series Delta Flow is constructed from 16 gauge aluminized steel and fully MIG welded for maximum strength and long-term resistance to the heat and vibration of demanding exhaust environments. A high-temperature paint finish protects the exterior and helps the muffler stand up to the punishing conditions found underneath any performance vehicle.
Key Highlights
- Two-chamber Delta Flow® design with Delta deflectors for increased scavenging and better performance
- Aggressive exterior sound with reduced interior resonance compared to the standard 40 Series
- 16 gauge aluminized steel body, fully MIG welded for maximum durability
- Protective high-temperature paint finish
- 2.50-inch inlet diameter
- Universal fitment for flexible street/strip applications
Performance and Sound
Flowmaster’s Delta Flow technology is all about balancing power and tone. The Delta deflectors inside the chamber generate increased scavenging, which promotes stronger exhaust flow and can help unlock better performance from your combination. At the same time, the design tempers interior sound, giving you a milder cabin experience and a more livable resonance profile than the classic 40 Series while keeping that hard-hitting attitude outside the vehicle.
Fitment and Installation
This is a universal muffler with a 2.50-inch inlet diameter, making it a versatile choice across a wide range of street and strip setups. It mounts using new hangers, which are not included, and any exhaust tips are sold separately, so plan your installation hardware accordingly. Always verify that the 2.50-inch inlet matches your existing exhaust piping before purchase to ensure a proper, leak-free connection.
Whether you’re chasing a more aggressive exhaust note, better scavenging, or the long-term durability of fully welded aluminized steel construction, the Flowmaster 40 Series Delta Flow Chambered Muffler delivers a proven combination of performance and sound for your build.
