The all-new Ichiban Billet Upper Water Neck V2 for the Mitsubishi Evo 4G63 is here — stronger, sleeker, and engineered for precision. Designed from a 3D-scanned Evo head for a flawless OEM-style fit, this billet upgrade delivers exceptional strength, cooling efficiency, and long-term reliability.
 
Key Features:
 
CNC-Machined from 6061-T6 Aluminum – built to handle extreme heat and pressure.
Perfect OEM-Style Fit – designed directly from a 3D scan of the 4G63 head.
Integrated M12x1.5 Temp Sensor Port – easy to install and perfect for aftermarket gauges.
Two Outlet Options:
Standard Outlet – OEM-style hose connection with internal ORB16 thread.
AN Outlet – direct connection to -16AN fittings for race or custom setups.
Heat-treated & corrosion-resistant finish – precision looks that last.
 
Note: Water temperature sensor not included (optional add-on available).

Replace your fragile OEM neck with a billet solution built for performance. The Ichiban Billet Water Neck V2 offers unmatched durability, perfect sealing, and a clean professional finish — made for enthusiasts who demand perfection.