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OT - BB 3x13 Polished
Polished brass, 3" diameter, smooth wall, dome end. Made in the USA
Should the system pressure exceed the cap’s rating, the spring will compress and fluid will flow through the upper tube to fill the chamber.
In the event the recovery tank reaches capacity, the fluid will find the second tube and exit to the street. A vacuum will draw the coolant back into the cooling system as the engine cools down.
Contact us directly for alternative sizes, finished or shapes.
We make to order. Please allow adequate time for us to build.
Build time estimates [January 2024]
Brass Model Ts 2 months
Black Model Ts FT 1-3 weeks - RT is 5 months
Model As 2-4 weeks
Heater cores 6 weeks
Common street rods 3 months
Tricky customs & restorations 4 months
We appreciate your patience as we continue to recruit and train new fabricators.