Pretty easy.. but not really
ITs pretty simple... you will need to jack up th front of the car of course...
You will need to make sure you havent driven the car, or let it sit for a few hours... unplug the o2 sensor, take off the heat sheild i think its like 5 or 6 bolts... Then from underneath the car, there are 2 bolts where the donut is, need to undo these... then the manifold has 8 bolts, take those out, and it should come out.. now getting that thing out may be tricky... you will have to turn it in different directions.. we ended up taking it our from underneath on my car...
Good luck