20-2013 KPMI, Black Diamond valve, intake. STD

This Kibblewhite Black Diamond intake valve is a high-quality, standard-size replacement for 1988 to 2003 XL1200 Sportster models. It is a direct replacement for OEM 18023-87, featuring a 1.710-inch head diameter, a 0.3100-inch stem diameter, and an overall length of 4.480 inches. KPMI manufactures these valves in the USA using one-piece stainless steel forgings and a specialized black nitride finish. This process results in a valve that is significantly harder and smoother than stock, reducing friction in the guide and resisting the high temperatures of a performance V-twin. It is an excellent choice for any mechanic looking to restore factory performance with a component that exceeds original equipment specifications.