Description
Overview
The Flowmaster 40 Series Delta Force Exhaust Muffler is built for drivers who want serious airflow and an unmistakable, aggressive tone. Engineered with Flowmaster’s proven Delta Flow technology, this race-oriented muffler delivers excellent power characteristics while still providing meaningful sound reduction over open headers. If you’re ready to shop for exhaust hardware that balances performance with a purposeful attitude, the Delta Force 40 Series is a proven choice for a hard-working exhaust system.
Flowmaster developed the Delta Force 40 Series race mufflers specifically for applications where a muffler is required but a substantial decibel reduction over open headers is still the goal. The result is a car exhaust component that lets your engine breathe while taming the raw volume of uncorked headers, making it a strong candidate for anyone building a dedicated performance exhaust setup.
Key Benefits
At the heart of this muffler is Flowmaster’s Delta Flow technology, which is engineered to promote strong power characteristics alongside good sound reduction qualities. That combination is why the 40 Series Delta Force has earned its place among race-focused mufflers, and why it stands out when comparing a magnaflow muffler or a flowmaster muffler for your build. Whether you’re piecing together a catback exhaust or upgrading a single restrictive muffler, this unit is designed to move air aggressively.
- Flowmaster Delta Flow technology for excellent power characteristics
- Aggressive sound level with substantial decibel reduction over open headers
- 3.50″ inlet diameter to support high-flow exhaust systems
- 9.50″ body width in the 40 Series Delta Force muffler design
- Durable high-temperature paint finish to withstand exhaust heat
- Universal fitment for flexible fabrication and custom exhaust routing
Configuration & Mounting
This muffler features a universal fitment, giving fabricators and enthusiasts the freedom to integrate it into a wide range of exhaust automobile projects. It uses new hangers, which are not included, so plan your mounting hardware accordingly. Exhaust tips are also sold separately, allowing you to finish your setup with the look you want. With a 3.50″ inlet diameter and a 9.50″ body width, it’s ready to anchor an aggressive cat back muffler system or serve as a standalone upgrade within your existing mufflers.
Fitment & Application
Classified as a race vehicle type with an emission code of 5, the Delta Force 40 Series is recommended for all racing applications where mufflers are required. As with any performance exhaust component, this product carries a California Proposition 65 warning. From dedicated track cars to purpose-built race machines, this Flowmaster muffler brings the airflow and aggressive character that serious drivers demand from a modern exhaust system.












