Part Description
For Branch heads: this valve is .060" shorter than stock so valve can be sunk in the head to clear the piston on high lift cams. For STD heads: special, extra flowing, oversized valves, available in two head sizes., Black Diamond exhaust valve for Branch heads Stem .3096"Head 1.615" Tulip Profile 23O Length 4.380"
Text excerpt from the catalog:
High-Flow racing valves made from special super alloy by Precision Machining as a replacement for Branch and STD cylinder heads on Evolution Big Twin but also suitable for custom tuning jobs.
