How much horsepower gain does a flowmaster exhaust system add?

The horsepower gain from a Flowmaster exhaust system can vary depending on the specific vehicle and engine configuration, but it typically ranges from 5 to 15 horsepower. This improvement is due to better exhaust flow and reduced backpressure, which allows the engine to perform more efficiently. For the most accurate assessment, it's best to consult specific product details or dyno results for your vehicle.