i have fitted a water toi air intercooler settup in a non water to air celica
nothin really bolts up straight forward
and i also think the outlet of intercooler to throttlebody
( a black plastic pipe with a sqaure on one end) this bolts to throttle body
this is bigger on the water to air so u might have to make sure u get it too
then u have to mount the pump
im pretty sure theres no straight forward mounting
and then u have to run the pipes a fukin shitfight
especially if u have a/c
this was just my experience on one model st182 or 185 celica
im much into what model has what but it was a gt4 type celica non water to air and we fitted a warter to air
we spent like close to 2 days fukin round with it so it would get expensive at a workshop
i also wired up the intercooler water pump to run 8 volts off boost then when u hit boost it would run 14 volts on a timer so each time u hit hi boost it would run 14volts for a minute
was big job and had to be done properly for a targa tasmania car