SpeedFactory Honda/Acura B-Series Upper Coolant Fill Neck

SpeedFactory Racing B-Series Upper Coolant Fill Necks offer an optimal solution for filling an engine's cooling system from the highest point. These necks are compatible with most aftermarket radiators, changing the high point of the cooling system for easy filling and air bleeding. Made in-house with high-grade aluminum, a laser-cut head flange guarantees a secure, accurate fit. The B-Series Upper Coolant Fill Neck is available for B16/ Integra Type R/ GS-R cylinder heads in -16AN or 32mm (standard hose end) configurations.