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Harley Shovelhead Spigot Manifold "O" Ring Heads (1 5/8", 41.25 Equivalent)
Early "O" ring manifold for early motors, 1966-E77.
Bore measures 1 5/8", which is a 41.25mm equivalent. "O" ring steps are square, and there are no clamping marks. Features a support bracket boss with bolt on the top.
For suitable boot consideration, the O.D. of the spigot measures 1 7/8".
031620 CR-4 (OS)