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Product Description
H-D #165-36, 18081-36
EXHAUST VALVE
For all 1936 - 1947 Knucklehead motors
High Quality Steel with Black Nitrate coating
IMPORT
What is Black Nitrate?
Black Nitrated Valves have been the standard in the industry for many years now.
The Black Nitrate coating is microhard - higher than the base stainless steel metal.
The Black Nitrite adheres to the base metal at a microscopic level, so it does not flake or break off.
The Black Nitrated surface finish of the valve stem is even smoother than with chromed stems - resulting in less friction between stem and guideProduct Tags
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