Right Cylinder Head Assembly - 1990 300ZX Z32

When sourcing a right cylinder head for your twin-turbo Z32, verify you're receiving the VG30DETT-specific casting, not the naturally aspirated VG30DE variant. The correct right-hand assembly carries Nissan part number 11040-30P00 (superseded by 11040-30P01), distinct from the left-hand 11060-30P00. These heads fit 1990-1996 300ZX Turbo models exclusively; JDM Fairlady Z units interchange but may lack US emissions equipment bosses. Critical inspection points include measuring cam journal wear—common on high-boost examples—and verifying the turbo oil drain back passage isn't clogged with hardened oil deposits. Deck warping must be checked with a precision straightedge; VG30DETT engines demand perfectly flat surfaces for multi-layer steel head gaskets to seal against boost pressure. Always replace valve stem seals and inspect exhaust ports for cracking. Installation requires new torque-to-yield head bolts, meticulous variable valve timing sprocket alignment, and fresh cam seals to prevent post-installation leaks.