Hi, i've just ordered a J's decat, it's got an 02 sensor but do i still have to buy something to stop the CEL light coming on or is that it?

Thanks.

 

I don't think it comes with a sensor??

Its likely you will need to space the sensor you already have on the car, to prevent a CEL.

I would have bought a Megan or Berk one on the cheap, as its just a bit of pipe.