removing the cat

[DaveD]

I am thinking of removing my cat and need to know if, when the oxy sensor is removed, anything else has to be done.

[martinclan]

I don't think you can just remove the oxy sensor without also changing the ECU. The ECU expects the oxy sender to be there and won't work well without it.

I had a cat on the 325 donor for my Marlin. I removed the cat but kept the the oxy sensor.

Robin

[jmc330i]

Remove the Cat and leave the O2 sensor in place, will work fine.