1JZ and 2JZ GTE - Billet Lower Water Neck (Rotated)
 
No more adapters. No more compromises.
 
Turbo manifold in the way? We fixed it at the source. The Ichiban Engineering 1JZ and 2JZ GTE lower water neck kills the need for a bolt-on adapter plate entirely - the 180-degree rotation you've been fighting for is machined directly into the housing.
 
Precision CAD-designed and CNC-machined from aerospace-grade 6061 aluminum with T6 heat treatment, this isn't a stopgap fix - it's built to outlast the engine it's bolted to.
 
Version 2 brings a modular outlet system that puts the control in your hands. Three interchangeable configurations, one billet base:
 
Key Features
 
Rotated Design - Built In, Not Bolted On
No adapter plates, no extra gaskets, no extra leak points. Clears turbo manifolds by design.
Base -16 ORB Connection
Run it short and clean - connect a -16 fitting straight to the housing.
Standard Hose Neck
OEM-style rubber or silicone hose compatibility, with internal threads ready for a -16 fitting when you're ready to upgrade.
Optional -20AN Neck
For high-flow builds that need the bigger line.
Fully Modular and Interchangeable
Swap between configurations anytime - the base never changes, only how you run it.
Aerospace 6061-T6 Aluminum
CAD engineered and CNC machined for a fit and finish OEM never delivered.
 
This is the lower water neck the 1JZ and 2JZ GTE platform should've shipped with.
 
** Running a 2JZ GE? This is the wrong listing - check our dedicated GE lower water neck instead **
 
⚙️ Fits 1JZ GTE VVTi/Non-VVTi and 2JZ GTE VVTi/Non-VVTi
📧 For technical questions or custom requests contact sales@ichiban.engineering