turning off rear o2 sensors/

[rdb420]

I am about to install a header and cat delete pipe. can I eliminate the rear o2 sensors or do I have to extend them and put them in the cat delete pipe? also I need an updated tune the header and cat delete pipe are both obx and are heat wrapped also I only use premium gas.

[hackish]

The front and rear o2 sensors share the same circuit for the heaters so you can remove functionality of them but you can't physically remove them or you will get a rear o2 sensor heater fault.

-Michael

[rdb420]

so should I use spacers for the o2 sensors or not? and if I don't use the spacers do I need to turn the sensors off? what about getting an updated tune?

[cranswick]

you can run cat-less, just leave the rear O2 sensor installed, you do not need to space any sensors. You can disable the rear O2 in fastworks via configuration > configuration scalars, leave the heaters enabled.