SpeedFactory Upper radiator filler neck 32mm (Honda B18C4/B18C1/GSR engines)
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SpeedFactory Upper radiator filler neck 32mm.
This SpeedFactory upper coolant fill neck is designed to change the highest point of the cooling system. This significantly simplifies filling and air bleeding, making it ideal for use with aftermarket, custom, or tucked radiators. Constructed from high-quality aluminum, it features a laser-cut head flange to ensure a precise and reliable fit on selected Honda B-Series engines.
Features:
- Simplifies filling and air bleeding of the cooling system
- Ideal for use with aftermarket, custom, or tucked radiators
- Constructed from high-quality aluminum
- Features a laser-cut head flange for a perfect fitment
- Designed for Honda B-Series engines (B18C1 / GSR)
- Equipped with a 32mm hose end configuration
Note: requires the SpeedFactory high-pressure radiator cap (SKU: SF-06-079) for installation

