What is the quietest 3 cat back exhaust for a 2014 honda civic si?

What is the quietest 3" cat back exhaust for a 2014 honda civic si?

If you install a 3" exhaust on a Honda, you will lose every ounce of torque its got.A 150-200ci engine with single exhaust is capable of
100hp=2" exhaust pipe
150hp=2.25"
200hp=2.5"
A 200-250ci engine
150hp=2.25"
200hp=2.5"
250hp=2.5"
A 250-300ci engine
200hp=2.5"
250hp=2.5"
300hp=2.5"
So unless your Honda has an engine with more ci(cubic inches)than listed above, you don't need a 3" exhaust.1/4" larger than stock is plenty unless you're running a larger engine or twin turbos

Thanks for your response but that didn't answer my question.

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