Seller notes

Kibblewhite Black Diamond Racing Exhaust Valve #20-4170R Harley Davidson Product Details All KPMI Black Diamond stainless steel valves are impregnated by a special German process to a depth of .002" with a surface build up of .0002"This Black Diamond process improves wear properties reduces friction and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis platingBlack Diamond valves are light strong one-piece forgings with profiles that provide excellent f...

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