i have a feeling that cluster you posted wont fit your gc, you will need the cluster with the three green plugs so thats version V and VI only, thought you should know that in case you were gonna buy that cluster you posted.

Ive changed mine to the jdm ra cluster and just recorded the kms for services etc, as long as i know they are legitimate myself i couldnt care less im pretty sure ive seen someone do a reset on a cluster on rexnet tho!