mmm the Rb30 head not as good as the rest ,,, but with lots of work bigger valves and adjustable rockers and solid lifter conversion it will be a monster turbo head and if you look at the top 10 drag Rb30s you will see that there very popular .. , it will run a 6boost turbo manifold and a custom intake manifold injectors will be id 1000 cc and i will make a fuel rail for it