Trick to removing O2's?
 

is there a trick to removing them, the one on the side with the battery on it, im having trouble taking out, can u do it from the bottom of the car? also the right one is tough to remove i can the wrench on, but its it usually hard to remove or should i use rust away

Soak them in a penetrant (PB Blaster, Liquid Wrench, etc.) for 5 mins - they should break free pretty easily. Yes - do it from underneath the car...

With a stock y-pipe it is a bit tricky to get a wrench in there. But all you need is to bread it lose then it should come out by hand.

When putting the new one in apply some copper anti-seize to make it easier next time. Also twist the o2 sensor the opposite way several times so when you screw it in the wires are not all twisted up.

And yes, you have to go from the bottom.

ok, i got it all done, to do the driver side o2 i had to use a ujoint attachment, and i used the anti-seize, the directions that came with it said to use it. I just notice that my starts are alittle more laggy than before when i chnaged it, but im guessing thats just my car getting used to being off the ramps and working in the new sensors