First to introduce V-Twin hollow stem 1.900ö and 2.000ö intake valves, an estimated 4 grams lighter than OE valve, ideal for higher revving engines Precision CNC machined from a stainless one-piece forging for higher strength & durability High grade allows design to withstand high heat and maintain roundness Chrome coated Micro-polished 7mm stem for smoother finish and less friction resulting in improved performance Multi angle back cuts for enhanced flow. VALVE EXH 1.650" SS TC