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Steeda Tune with Texas Speed catless headers

Buckeyeguy

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So I ordered SCT BDX tuner with Steeda tunes for life for a 2016 GT. I have Texas Speed catless headers on order. When I was filling out the tune form I noticed it said "This will not turn the catalytic monitors off". Does that mean I can't use an offroad midpipe? If that's the case should I get high flow cats or put my money into a ported intake? Is there much power loss between the off road and high flow cat midpipes? The headers are on back order so it's not to late to change to high flow cats or go with a manifold instead.
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kevinvan6000

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It will throw a code for the rear o2 sensors without the cats there so you'll have a check engine light come on. They used to be able to disable the rear o2's in the tune so that wouldn't happen, but they aren't allowed to do that any more due to emissions laws. If you don't mind having the engine light on and don't have to worry about emissions testing, I wouldn't worry about it.
 

Buckeyeguy

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It will throw a code for the rear o2 sensors without the cats there so you'll have a check engine light come on. They used to be able to disable the rear o2's in the tune so that wouldn't happen, but they aren't allowed to do that any more due to emissions laws. If you don't mind having the engine light on and don't have to worry about emissions testing, I wouldn't worry about it.

Thanks for the Reply. I've done some research and most people recommend using defoulers.
 
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AZ18yote

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<5whp between catted and cattless LTH.
 

BrianGT2015

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Follow up question. Can you use the studs or do you need to use bolts with the install?
 

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