but dont those options require a car pc? and all the problems and expense and time that goes with it? the blitz is 535dols us. ready to go. As a matter of fact, the obdiII port on the 2008 sti does carry manifold preesure. It can be selected on my accessport as a live reading. I just rather have something built in that doesnt show so that every random person inn the car doesnt swant to play with it.