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Yes, with larger pipes, straight through mufflers it will drone. Also I dont have primary cats, only secondary high flow cat. Catalytic converter is a great sound suppressant. It takes tremendous amount of noise from engine.
That branch is called 1/4 wave resonator. It should kill some drone, if it will not work, I will fab up Helmholtz resonator.
I am using Vibrant mufflers/resonators. All mufflers are the same size.

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Is that your garage or shop? Nice man. I don’t have that kid of luxury. I drove around and look for a comfortable and quiet spot to work on my car on a dry and warm day. I just want to make absolutely sure I have all the tools I need for that particular job. Power tool is a no go!

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