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Black Diamond Valve - Exhaust Std 26.00mm/1.024" - CRF250R 10-15


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Part Number
67-3031466
OEM Number: 30-31466
Color / Material
N/A
Canadian Retail Price
$58.95 cdn 7

Availability information

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Product Information

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 plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond™ Valves are lightweight, strong, one piece forged with profiles that provide excellent flow characteristics.

Type Exhaust
Material Black Diamond™ Stainless
Coating Black Nitroneg
Quantity Pkg. of 1
Head Diameter 25.00mm / 0.984"
Stem Diameter 4.5mm / 0.1760"
Tulip 20º
Overall Length 3.310"
Remarks Standard
Replaces OEM P/N 14721-KRN-A40
Note These valves are intended as O.E.M. replacement valves and are completely compatible with the O.E.M. spring kits.  However, experienced engine builders, who are running aggressive camshafts or higher than factory RPM’s may find the combination of the O.E.M. Style Valve and KPMI’s Lightweight Racing Spring Kits advisable. All titanium valves are (Tensilite®) PVD CrN coated, and all stainless valves are Black Diamond™ coated. Must use Kibblewhite® Lightweight Valve Spring Kits when installing Black Diamond™ Intake Valves.

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