G4+ thunder on my Supra and G4X on my K24A3 engine, Sadly Link don't do a ECU that will run mt N54. Link ECU's are great. Still finding out all the differences between them, but like the G4 to G4+ it will be a few firmware update's that will really show them soon, Oh a big G4X update came out on Friday just gone (I'm a full time Dyno tuner so loving these updates)