Description
Overview
The Flowmaster Pro Series Muffler is a universal-fit performance muffler engineered by Flowmaster to deliver serious flow without the drone of an open pipe. Built for demanding applications, this Pro Series design covers everything from street trucks and diesel pullers to RV pushers and every class of racing on dirt or asphalt. If you have been searching for a Flowmaster exhaust upgrade that balances power and controlled sound, the Pro Series belongs on your short list.
During development at the dyno and on the track, the Pro Series mufflers from the Flowmaster exhaust company consistently delivered performance equal to or surpassing open pipe systems, all while dramatically reducing sound levels across the RPM range. That means you get the flow benefits of a wide-open setup with a moderate, more livable tone — a combination that has helped make Flowmaster mufflers a go-to choice for performance builds.
Key Benefits
As part of the broader family of Flowmaster exhaust systems, this Pro Series muffler is designed to be a durable, high-flow centerpiece for your build. The high-temperature paint finish is made to stand up to the heat generated by hard-working race and diesel applications, and the universal fitment makes it adaptable to a wide range of custom exhaust configurations.
- Pro Series design from Flowmaster, engineered for street trucks, diesel pullers, RV pushers, and every class of racing on dirt or asphalt
- Performance equal to or surpassing open pipe systems, proven at the dyno and track
- Moderate sound level — dramatically reduced across the RPM range compared to open pipe
- 3.00″ inlet diameter and 3.63″ outlet outside diameter for high-flow exhaust routing
- High-temperature paint finish built to handle demanding, high-heat use
- Universal fitment for flexible custom installation
Options & Fitment
This is a universal muffler, giving fabricators and builders the freedom to integrate it into a custom Flowmaster exhaust system tailored to their vehicle. With a 3.00-inch inlet and a 3.63-inch outlet outside diameter, it is sized for serious high-flow builds. The muffler carries an Emission Code of 5 and is classified for Race vehicle type, so plan your installation accordingly.
Whether you are assembling a dedicated race setup, upgrading a diesel puller, or building a street truck that needs the flow of the Flowmaster 40 attitude with Pro Series performance, this muffler delivers the flow-forward engineering the Flowmaster company is known for. Choose the Pro Series when you want one of the best muffler options for high-output applications that still keeps sound at a moderate, controllable level.
Warning: This product carries a California Proposition 65 warning. It is intended for Race vehicle applications.










