You guys truly saved me many hassle that has a disgruntled customer on this a person. Ralph, I owe you guys a beer when future I occur around to your warehouse. Arigato!The RB25DE cylinder head from the A31 Cefiro C33 Laurel or R32 Skyline (aka: Non VCT) may be used. The RB25DET (with the R33 Skyline or C34 Laurel or Stagea) head is likewise used,