Can you change out the fronbt o2 sensors in my 96 z without dropping the pipe that runs from the drivers side to the passenger side and if you have to take it out do you need to buy a replacement gasket that goes between drivers exhuast man and that ypipe i think its called? I think my 02 are messed up. But they do cycle and if they cycle buddy said then they are good.

So appreciate any tips for changing these front ones out.