Hi Mikkel, you new here? welcome, have fun!
that sounds like a standard actuator from those numbers, although the 2wd ones I've seen have been marked -18 rather than -17..
The 4wd intercooler is larger (but similar style) than 2wd, the RS500 one is huge, and mounts in front of the radiator instead of on top like 2wd and 4wd ones.
You can if you wish mount either on your 2wd, although unless you intend to be uprating engine power, it's doubtful you would notice any benefit.. Also worth noting that the RS500 cooler has larger diameter outlets that will not fit the standard boost hoses.