20-2010 KPMI, Black Diamond valve, intake. 883-1200 conversion

If you are performing an 883 to 1200 conversion on a 1986 to 2003 Sportster, standard valves won't always cut it for the breathing improvements you need. This KPMI Black Diamond intake valve is engineered specifically for these conversions, offering the larger 1.715-inch head diameter typical of a 1200, but maintained at the shorter 4.550-inch overall length required for the 883 heads. Machined in the USA from a one-piece stainless steel forging, it features a black nitride finish that significantly reduces friction and resists wear. With a 0.3100-inch stem diameter, this valve provides the high-performance flow needed to make the most of your displacement increase while ensuring the valvetrain geometry remains correct for your specific build.