I questioned to get a quote with a Sunday afternoon and gained it inside the hour. That’s fantastic customer service! T.U. NMThe RB25DE cylinder head with the A31 Cefiro C33 Laurel or R32 Skyline (aka: Non VCT) is usually used. The RB25DET (with the R33 Skyline or C34 Laurel or Stagea) head is likewise used, on the other hand an exterior oil feed