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I had a Tomei UEL, JDL ultra quiet over frontpipe (1 cat and 1 resonator in the front pipe), and Perrin's 3 inch. So it was very similar to what you were planning. If you plan to go FI, you'll most likely burn through/melt both cats eventually especially if you plan on tracking the car too. If it's just a DD, then a cat in the front pipe should be enough. But don't bother with a cat in the header.
But anyways, it sounded really nice. Loud-ish when you punched it, but subtle while cruising. It was actually not loud enough for my taste. So now I run the JDL turbo kit with their 3inch over front pipe, dual resonated, 0 cats, and the 3" dezod catback exhaust. The turbo acts as a muffler so it's definitely louder than the setup I previously had while supercharged, but it sounds deeper and has a nice boxer rumble to it.
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