RE: Spyder valve
Consider removing the bumper cover, it's not required, but it gives you MUCH more room to reach everything. I didn't on mine, but wish I had after seeing my bumper cover off later, after the install.
If you have not removed the air silencer yet, under the stock air filter and on top of the compressor, remove it first. There is no room to reach the four bolts on the compressor without doing so. Remove the stock air filter housing to get at the silencer(remove air tube(screw clamp)remove maf electrical connector,screw out bolts(housing to frame, not the filter access bolts)(one engine side low, one toward radiator high, loosen one on fender side for an open slot on housing to slide off of); with this out of the way, you will see three bolts around the round air passage to the filter. These are securing the air silencer. Remove these, remove the air silencer through inside fender well. This thing is bigger than you realize, will take some effort to twist it out.
Now the compressor is visible. Remove four bolts,remove four air lines(the plastic air line on mine had gotten hard in the connector, was very difficult to remove(I cut a couple of mine, you will have PLENTY of new line)add the new connectors and new line and connect to new valve) and disconnect the electrical connector(connector is difficult to reach and seperate, the air passage above helps tremendously).
This is where you wish you removed the bumper cover if you didn't.
You will need to seperate the vent wire from the harness. Not hard to do,(pry out center harness lock, pull wire out) but not easy to reach it. You will add an extention wire for(to reach) the new valve. Mount new valve, mount new compressor(the bolts from old compressor will have sleeves on them when you remove them, these were originaly attached to the compressor by a rubber membrane to isolate the vibration; discard these sleeves, you will see them integrated on the new compressor), attach new air lines from new valve. Button everything back up, and you are finished. The new valve will make a noticable whoosh(about five or six seconds long) when you close your door, after stopping from a drive .