May not be necessary - need to get input from those with them as to the sound increase. They are stubby fat cats and I have not seen mufflers or resonators that look like they will fit. I have a year or two to learn since I don’t want to void my warranty. The rest of the exhaust is pretty tame, which is why there is active sound. Maybe turn off the fake sound and the exhaust sound be ok with just the cat deletes. Another option is to leave the secondary cats.
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