Removing stock cats

[rainmaker]

removing cats - do I need to have tune updated?? Will it throw some error codes or can I drive it and just check the a/f?

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[Barrel]

It's going to throw a cat efficiency code causing CEL.

 

[theman]

unless you also at least weld in some O2 extenders or some other foolery for the ECU to read the single as normal.

 

[mustang_guy]

That's illegal, im telling.

 

[rainmaker]

unless you also at least weld in some O2 extenders or some other foolery for the ECU to read the single as normal.

Cat delete pipes with bungs for O2 sensors - so I should be good with existing tune?

 

[2015 Silver GT]

COT will need to be turned off with a tune revision along with the rear o2's.

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