Hi, i just imported a JDM 350Z (Fairlady) and now need some upgrades. I do not live the the US nor UK, live in South America, Brazil, where we are mostly US oriented in terms of parts/tune/upgrades. 
  
Only thing i know is that USDM and JDM ecu' s are not compatible therefore eliminating the "US tuning" options, COBB etc. 
  
Can anyone please advise what my JDM options are, since we have little or no experience with JDM 350Z's , every tuner here tells you "buy US spec and we can help you......", then again what is different? the ecu and or whole wiring harness? 
  
Since the UK does have a lot of imports i hope you can help 
Here are my primary needs: 
  
Speed limit - removal what are the options? HKS SLD? which type do i need? 
Tune- What are the JDM piggyback and/or tune options? reflash? .... i will be travelling to the UK end of Feb., so maybe i can carry me Ecu with me?? 
For now, any piggyback option will do. 
Also i see some folks are using D1 spec throttle controller, which i see i cannot order for my market, looking at the Weapon R option controller. Do you think that will be compatible with JDM ecu? since it's on the US ebay market? 
  
Any answers will be greatly appreciated.