Cat Delete on A '99 Trans Am General Question

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Jul 8, 2015 | 09:51 PM

LTX_Alex

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Launching!

Joined: Jul 2014

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From: Las Vegas, Nevada

Cat Delete on A '99 Trans Am General Question

I plan on cutting out my cats next week. My question is, does the cat need to be tuned out if I remove it so the SES light won't come on? Or I can buy rear o2 sims for the rear to trick the PCM thinking there is a cat in place? I just don't want to throw a code. I have stock exhaust manifolds and no ORY either. People are saying that I don't need to tune out the cats and some are saying that I can buy rear o2 sims and it won't throw a code, I just don't know.

Any ideas?

'99 Trans Am

Jul 8, 2015 | 10:24 PM

Mappinsj

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Joined: Nov 2014

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I placed gutted cats in my 2000 camaro, I have driven 9000 miles since with NO 02 code,

there is also a good bit of leaking from my cats before it hits the rear 02 so that's just my own story