Extremely liable people today and the engine is jogging ideal following a handful of months of use. Hugely advised.The RB25DE cylinder head through the A31 Cefiro C33 Laurel or R32 Skyline (aka: Non VCT) might be used. The RB25DET (from your R33 Skyline or C34 Laurel or Stagea) head can be used, having said that an exterior oil feed have to be fabr