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Originally Posted by pbonsalb
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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I was thinking of leaving the secondary cats, but I’ve already got the evolve stage 2 tune ready to upload, and not sure how well it would work with just primary deletes. Imagine I would have to take the car to them for a custom map. Stage 1 is quick enough for now. Hopefully someone has feedback just running primary and secondary pipes on a stock exhaust.
On another note, how do you actually turn off the active sound? Is it coding or an option.