Exhaust Valve. Fits Evolution Big Twin 1984-1999. OEM Replacement

* All KPMI Black Diamond Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface buildup of .0002. This process improves wear properties, reduces friction, and provides resistance to corrosion and wear. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench.

Head Diameter: 1.615"

Stem Diameter: 0.3096"

Tulip: 29º

Overall Length: 4.525"

* Replaces OEM # 18082-83