Heres a list of parts I need to install, what should I install first...

Parts I have: AMS DP, AMS HFC

Parts I am getting soon: AEM wideband, AEM boost gauge, A pillar gauge pod

The hfc has the bung for the wideband already, should I wait and install all of these parts at once or is it fine to install the DP and the HFC now and wait for the gauges and pod.

 

You might as well wait.

 

I'd do all the exhaust stuff first, then electronics.
Or do it all at once... Make sure you install the wideband o2 sensor before finishing the exhaust install. You can leave the harness unplugged until you install the gauge.

 

You have to remove the cat to install the DP anyway. If it'll be a while before you can do the DP then you could always throw the hfc on right now but you'll waste a gasket or two.

 

Yeah, looks like I am going to wait then. I wish there were more a pillar options, looks like I am going to try and make my own.