CP mufflers are basically resonator deletes. I had it for a week with catless DPs and it wasn't crazy loud. It was a decent sound though, especially at WOT. You can try that first and, if it's not aggressive enough for you, always have the option to add a catback later.
I ended up with catless DPs and Eisenmann sport mufflers and it's perfect. Aggressive when it needs to be but not obnoxious under normal driving.
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