Hello, i have a 1990 300zx TT with a manual conversion (original UK model) i have done some engine work on it by upgrading the injectors to 555cc with an apexi boost controller among other things, i was supplied with a "generic" chip by the person who socketed my ecu for me and he told me to talk to Nel aka NOS to find out about getting a custom ecu chip made for the car. It currently runs but badly, i have gone through the engine and tried to solve problems such as vac leaks that could cause the issue but have now come to the conclusion that it isnt broken it just needs setting up properly.