High Flow Racing exhaust valve 1.75"

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 STD heads Stem .3095"Head 1.750" Tulip Profile 24O Length 4.480"

High-Flow racing valves made from special super alloy by Precision Machining as a replacement for Branch and STD cylinder heads on Evolution Big Twins but also suitable for custom tuning jobs.