Nice example of a Factory RB26DETT with uprated turbos breathing at just 1.3bar (any more than 500hp and the factory MAF sensors start to top out..
Next step Series 1 GTSt MAFs or Z32 or Nismos even
then the HKS GT SS’s can be remapped for 1.5bar solid and see a consistent 420whp (around 530 + hp @ the fly)