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Kibblewhite Black Diamond Intake Valve

Manufacturer Part Number 20-4258

J&P Part: 422-570

1 Reviews

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Description for Kibblewhite Black Diamond Intake Valve 

Kibblewhite Black Diamond Intake Valve

• All Kibblewhite Precision Machining, Inc. stainless steel valves are impregnated by a special German process with a .002" deep & .0002" surface build-up to improve wear properties and reduce friction

• This improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating

• Designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench

• Black Diamond Valves are light, strong, one piece forgings with profiles that provide excellent flow characteristics

• Head Diameter: 1.825″/46.36 mm; Stem Diameter: 0.3095″; Tulip: 23°; Overall Length: 3.565″; Remarks: Standard

• Replaces OEM 18071-58

Made In The USA This product was proudly made in the USA

Product Specs

Intake or Exhaust: Intake Valve

Manufacturer Part Number: 20-4258

Nitrided: Yes

OEM Reference: 18071-58

Overall Size: Standard

Sold in Units: Each

Warehouse Part Number: 1037374

Fitment for Kibblewhite Black Diamond Intake Valve 

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Harley-Davidson® Models

Sportster 900 Electric Start XLH900 : 1967–1969
Sportster 900 Kick Start XL900 : 1958–1959
Sportster 900 Kick Start XLCH900 : 1959–1969
Sportster 900 Kick Start XLH900 : 1958–1966

Customer Reviews for Kibblewhite Black Diamond Intake Valve 

Overall Rating:
5/5 based on 1 rating

5 by

works great

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