what extra hardware do i need?

 

you need the map sensor 3bar unit usally is what most get.
you may ot may not need the boost control solonoid if you watn to run boost controller off it
You may or may want to buy the egt upgrade for individual control

but main thing is the map sensor.

 

i got a GM 3bar MAP sensor and the GM boost control solenoid...... what kind of EGT guage do i need?

 

its addon package it can monitor indivudal egt in each cylinder if you want it to.. but most people dont use it though.

check out aempower.com

 

well, if most people don't have one, then i won't bother with it, i do however need an autometer EGT and intake air temp guage.....

so, those are the only "additional hardware" items i need, if that's all, i got no problems. oh yeah, that extra plastic plug in that came with it, is it for like the boost controller, and for the wideband O2 signal, etc???