More normally a hybrid conversion with the RB30E block as well as a twin cam RB25 head without a turbo is likewise used as being a foundation for that RB30DE.The RB25DE cylinder head through the A31 Cefiro C33 Laurel or R32 Skyline (aka: Non VCT) might be used. The RB25DET (through the R33 Skyline or C34 Laurel or Stagea) head is likewise used, hav