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Connor do you have 2.5" piping or 2.25"? I've got the same setup...FI RHFC's and FI CBE (non-resonated) and it's crazy deep. I had a friend that's a girl in my car a few weeks ago and she said, "Is all that deep noise coming from your car??" I said yes. She was quite surprised...lol.
I have 2.25". The resonators that are a part of the cats limit some of the noise I'm desiring and I'm curious to see how the Z1 pipes compare to the FI resonated pipes.
