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Discussion Starter · #1 ·
I’ve read a few threads on this, but I need some more info before I go ahead and do it. I see people saying that the half gutted will still through a CEL. Is this true? Also they say to gut it you have to drill into it, I don’t know if I’m really dumb or what, but do you actually drill through the outside of the cat? Also will I be able to run this setup safely without a tune?

any help is appreciated, thanks.
 

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2015 auto VT, 2013 manual VT × 2
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Yes will be safe without a tune.

Drill out means drill out the material inside of the cat not drilling through the outside of the cat. Be careful not to hit an O2 sensor. No codes on a half gut. Will have code on a full gut if you do not tune it out or use a proper spacer or elbow under the rear O2 sensor.
 
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