I have had the flowmasters with a Mac off road h-pipe, I don't have to worry about not being heard by anyone. It droans horribly between 2000 & 2500, everyone says the car sounds super, I agree but it is in my opinion just a little bit to loud. I was thinking of switching to an X pipe or a pro-chamber in the hopes that it would be a little bit less on the obnoxious side.
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