AGP is adjustable wga so you dont "tune" you just adjust the nut tighter or looser depending on whether you want more or less boost
not for installation there is 2 bolts that are currently holding your stock wga on, undo those, pull the cotter pin out of the eyelit and then remove stock wga.
to install the AGP, bolt it up fingerish tight to the turbo and loosen the eyelit til it just slips over the flapper arm on the manifold. to be sure the flapper is fully closed, pull the arm to the DRIVERS SIDE, that will be completely closed, and slip the wga eyelit over it, install cotter pin and tighten the bolts and your done.
also AGP needs to run on wga control boost NOT PCM so youll have to take the car off pcm control boost and route the line that would normally go to the solenoid and then back to the turbo from going from the nipple on the AGP wga to the nipple on the underside of the turbo. and be sure to block off the solenoids so they arent venting to atmosphere or trying to take readings.
goodluck :thumbsup:
P.S. be sure to ziptie all lines or solenoids that your closing off.