Description
Overview
The Flowmaster 40 Series Delta Force Race Muffler brings proven Delta Flow technology to your exhaust system, delivering a strong blend of power characteristics and effective sound reduction. Engineered for racing applications where mufflers are required, this Delta Force muffler is designed to tame the raw roar of open headers while helping you maintain the power delivery you’re after. It’s a purpose-built performance component ready to become the aggressive-sounding heart of your exhaust setup.
Delta Flow Technology & Sound
At the core of the 40 Series Delta Force is Flowmaster’s Delta Flow technology, which is tuned to provide excellent power characteristics alongside good sound reduction qualities. Flowmaster specifically recommends this muffler for all racing applications where a substantial decibel reduction over open headers is needed. The result is an aggressive sound level that announces your build without the uncontrolled volume of running headers alone — a smart middle ground for serious performance vehicles.
Built to Perform
Finished in high-temperature paint, this muffler is prepared to handle the demanding thermal environment of a hard-working exhaust system. With a 3.50-inch inlet diameter, it’s sized for higher-flow applications, and its universal fitment makes it a flexible choice for custom exhaust fabrication and a wide range of builds — particularly classic muscle cars looking to combine that timeless aggressive tone with modern muffler engineering.
Key Highlights
- 40 Series Delta Force race muffler featuring Flowmaster’s Delta Flow technology
- Aggressive sound level with substantial decibel reduction over open headers
- 3.50-inch inlet diameter for higher-flow exhaust applications
- Durable high-temperature paint finish
- Universal fitment ideal for custom builds and classic muscle cars
- Recommended by Flowmaster for racing applications requiring mufflers
Fitment & Installation Notes
This muffler is designed with universal fitment, giving fabricators and enthusiasts the freedom to integrate it into a custom or existing exhaust layout. Installation uses new hangers, which are not included, so plan your mounting hardware accordingly. Exhaust tips are sold separately, letting you complete the look exactly the way you want. Please note this product carries a California Proposition 65 warning and falls under emission code 5, and it is intended for racing applications as specified by the manufacturer.
Whether you’re finishing a classic muscle car restoration or dialing in a dedicated race build, the Flowmaster 40 Series Delta Force Race Muffler delivers the aggressive character and performance-minded flow that Flowmaster is known for. Choose it when you need a muffler that quiets open headers to a manageable, race-ready roar without sacrificing the power-focused design at its core.
