ok...i've bit my lip long enough.
first of all the AEM
xai gives 5-7whp on a 6-speed gts. numbers with 17-12whp are dynos taken from uncorrected dynos or cars that already have an exhaust. import tuner did a dyno of this just recently.
TPR is the only Intake
that claims to not bog because of it's masf fins that simulate the airflow of the stock airbox. no bogging...no CELs
it is very difficult to hydrolock your car with a CAI
...especially with a celica. why? because the filter is a good foot and a half above the ground..plus the fender plastics and front bumper give it more than ample protection. you would have to literally be an idiot and dunk your car in a lake to hydrolock.