[Blk16SS]

Originally Posted by FlowmasterMufflers

We apologize that it has taken us a while to get back to some of you. If you have an urgent question, please do not hesitate to call us at (707) 544-4761.



Our American Thunder Dual Mode Axle-back system will increase sound levels inside of the vehicle in touring mode as well as in track mode. As with any of our 40 Series mufflers (this system features Delta 40's), resonance will be present to some degree. Is drone a huge issue with this system, not especially, but everyone has different opinions and preferences when it comes to sound.



This system is more aggressive than the factory system in both modes. Unfortunately, because many factors can affect the accuracy of a dB reading (distance, environment, dB meter used, etc.) we do not provide those figures.

Does it make power?