Used UpRev cable, works on both 350z and 370z vehicles that have been UpRev-ed. Details here: http://uprev.com/secure/store/management/uprev-interface-cable
Software is free from here: http://uprev.com/secure/support
It can be use to monitor parameters, write a new tune/map sent by your tuner, check and delete errors / check engine light ON.
Extra:
License on cable - Ask your tuner to build your map and email the ROM file to you, you can upload it in your ECU. This is a good option for guys doing supercharger installation, having a base map before you travel to have a full dyno session. You will only be charged for dyno time, no license fee, saving some pennies
£200 delivered