keith-c

I've already bought and installed a borla cat back exhaust. Now i was planning on buying the racing beat headers and presilencer. My question is what happens to the o2 sensor thats in the headers? I thought without it put in the check engin light comes on? Secondly im in the process of removing the ACV. I bought the plate that goes behind the ACV but how to you block the hoses that go to the back of the engine?
Thanks in advance

keith-c

also does removing the ACV have and negative effects on the engine?

SDrotary-FC

there is a o2 bung on the racing beat headers