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About ZL1_MATT

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  1. I swapped out the muffler and the little mechanical valve just in front of the muffler.
  2. I just put a 40 series on my truck and it's still pretty quiet. Much quieter than you think it would be. It has a nice low rumble and sounds like it should have from the factory. I have even already towed with it and there is zero drone! Really happy I decided to go with the 40 over the super 44.
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