Chase Bays -16AN / -20AN Raised Inline Filler Neck w/Cap
The Chase Bays Raised Inline Filler Neck offers a unique set of innovative features. It is designed to solve a major set of problems in an aesthetically pleasing and modular way. Originally we used these to raise the fill point for our Tucked Radiators since the radiator height was lowered, but once we opened the book we found many things to fix. Lets start at the most obvious feature...
Raised Fill Point
Many might not understand this yet but for other half; they're jumping for joy. This is a feature no other company is offering. A major issue with some engines (especially engine swaps) is the difficulty in bleeding the system. The fill point on the radiator is lower than the coolant passages in the cylinder head or the heater core. This causes unsolvable air bubbles that continue to accumulate as the system cycles. Even when you use coolant bleeding kits, it puts the cap and overflow point below those coolant passages. This causes the cap to overflow more fluid per second if the pressure level of your cap is exceeded. All in all, its an issue enthusiasts have been dealing with for decades.
Our filler neck raises the fill point 3.75" inches / 95.25mm from the center of lower fitting to where the cap seal ends (not the very top). The total height from bottom to top is 5.25" inches / 133.35mm. It installs by welding one of the adapters directly to the upper water neck. You can see example photos below. You can also butt the filler neck up to the water neck and use a short piece of hose to connect the two. That method will take up to 3" inches / 76.2mm more space, but in some scenarios space is not an issue.
Modular
We have made the inlet and outlet -20AN female ORB threads and we made adapters to cater to 99% of applications. This is another feature that no other company is offering. The adapters are offered in:
• 1.38" Normal hose connection (SR20DET, 1JZ-GTE/2JZ-GTE, all Honda, Subaru, Toyota)
• 1.5" Normal hose connection (RB20/25/26, GM LS V8, KA24DE)
• -16AN (1" inch inner diameter)
• -20AN (1.25" inch inner diameter)
