We're often asked about how one muffler compare to another in sound. It's always a hard question to answer, because most folks don't have time to try numerous mufflers.

In this Power TV video (http://video.streetlegaltv.com/video/13282) and accompanying article they tested the 70, 50, 44, 40, 10-Series mufflers for interior and exterior sound level comparisons. Idle sound levels are also included in the exterior audio shown with a decibel meter. They also go through details about how Flowmaster (http://www.flowmastermufflers.com/) mufflers work and which ones best suit different applications.

http://www.dragzine.com/tech-stories/exhaust/sound-comparison-of-five-of-flowmaster%E2%80%99s-popular-series-of-performance-mufflers/

http://www.streetlegaltv.com/photos/data/740/fm44-2.jpg

http://www.streetlegaltv.com/photos/data/740/fm70-2.jpg

http://www.streetlegaltv.com/photos/data/740/IMG_5283.JPG