This extended fill neck raises the water fill point 6" above the manifold, which is ideal for bleeding off air within the cooling system. 6061-T6 Billet aluminum construction for light weight and durability in racing environments. The fill tube is angled at 45-degrees to provide clearance for large air filters, scoops, etc. Includes a 1/8"NPT to 3/8" barbed fitting for plumbing of an expansion tank. Accepts standard radiator caps or our #81-016 and #81-030 or 81-116 Billet Cap. Designed for use with our #80-000 or similar filler necks.
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