RB26 Billet Upper Water Outlet Neck 11060-05U00
 
Introducing the ultimate upgrade for your RB26 cooling system — the Ichiban Engineering Billet Upper Water Outlet Neck. Designed to replace the dull, leak-prone OEM casting, this billet masterpiece delivers improved reliability, performance, and aesthetics for your RB engine.
 
CNC-machined from 6061-T6 billet aluminum, the Ichiban water neck adds modern functionality without compromising OEM fit. It features a built-in O-ring flange for a perfect seal, an optional integrated temperature sensor port, and both hose and AN connection options for total flexibility in any setup.
 
Key Features
 
Direct OEM Replacement: Perfect fit for RB26 engines while upgrading to billet precision and durability.
Integrated Temp Sensor Port: Choose from M12x1.5 (OEM sensor), 1/8” NPT, and more.
ORB-Threaded Outlet: Compatible with -16AN or -20AN fittings, or standard silicone hoses using the built-in lip.
Leak-Free O-Ring Design: The flange side now seals with an O-ring instead of a paper gasket — no more coolant leaks.
Premium Billet Finish: Machined from aerospace-grade 6061-T6 aluminum for strength, shine, and corrosion resistance.
Plug-and-Play Fitment: Bolts directly to OEM manifolds with no modification required.
Ditch the dated cast neck and step up to a true billet solution — built to last, engineered to perform, and finished to perfection.
 
⚙️ Fits Nissan RB26 engines with OEM Intake Only !
📧 For AN fitting options or special requests, contact sales@ichiban.engineering