Valve. Exhaust Valve on Big Twin 1948-84 & Intake Valve on Big Twin 1948-1965. 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: 1.750"

Stem Diameter: 0.3760"

Tulip: 29º

Overall Length: 3.810"

* Replaces OEM # 18082-57, 18087-81

Fitment is listed in the product title above. Not sure it suits your bike? Ask our workshop — or book it in and we'll fit it for you.