You unscrew them and screw new ones in.

BUT FIRST. You have to take off the intake manifold to get at the rear bank. Kinda a pita, but it's not that bad from what I hear. And of course, pull off the wires before you take out the plugs.

 

Man......I was hoping I could get around the "taking the manifold off" part.....thanks.....

 

It is possible to just unbolt the intake & pivot & raise it up enought to get the back plugs out. This way you can leave all the hoses & crap connected. Just remove the 3 bolts from the rear bracket & the bolts & nuts holding it to the lower intake and disconnect your CAI or Stock Air Intake.

 

Would I also need to disconnect the throttle body also???

 

Only from the Air Intake. Everything else going to it has enough slack in it to be pivoted slightly. I originally had the DIYs put up for removing all of this (but am waiting on some others to take them over for me). If you need the instructions send me a pm with your email & I will send them to you (without pics)