Valve Train Components by Kibblewhite, Vesrah & Wiseco

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Kibblewhite Precision Machining Inc (KPMI) is known for performance powersports valve train components. The family-owned California company has been designing and manufacturing race proven & street-tough valve train components since 1938. We carry all of their products:

Black Diamond ® Stainless Steel Valves are impregnated by a special German process to .002” deep with a .0002” surface build-up to improve wear properties and reduce friction. This process provides resistance to corrosion and wear that is superior to that developed by hard chromium and electrolysis nickel plating. These valves are light and the profiles provide excellent flow characteristics.

White Diamond ® Valves are fully CNC machined from a one-piece forging of either EV8 Stainless Steel or Inconel-751. These materials have proven heat and corrosion resistance properties and are hard chromed with a 360 degree anode to produce the highest possible grade of hard chrome finish.

TENSILITE ® Valves are manufactured from solid U.S. milled titanium bar. The titanium bar is cut, forged and then the stem is pulled from the forging process and cross-sectionally reduced. After all final grinding and machining the valve is encased in a hard titanium nitride shell. We have tested these valves in the lab and on the track. They have proven themselves time after time in many high-demand applications, from a dual stage nitrous motor to a recent “Superbike from Hell”.

C63000 Nickel Bronze Guides utilize C63000 nickel bronze as a material to make valve guides because of its ideal characteristics for the application. The 4-5 percent nickel content produces superior resistance to wear, and the approximately 80 percent copper content delivers outstanding heat conductivity.

Cast Iron Valve Guides are made using their own specification of cast iron made exclusively for them. They specify elements such as carbon, silicon, manganese, nickel, chromium, copper and sulfur to produce a highly pearlitic structure with dense fine grains for excellent wear resistance.

We carry Vesrah intake & exhaust valves, valve stem seals & valve keepers. Vesrah valves are manufactured from top quality materials that meet or exceed OEM specifications. All valves are treated with the tuftrid method to give additional corrosion resistance and mechanical strength. .

Wiseco valves are manufactured from premium materials to exceed OEM standards. They feature forged one piece construction & are chromium nitride coated for hardness & wear resistance. Wiseco’s titanium valves are stronger and more reliable than the OE. The stainless steel line of valves are manufactured to exacting tolerances from the highest grade alloy. These valves are coated for longevity and peak performance. All Wiseco valves are forged as one unit rather than pieced together for reliability and strength and are coated with CVD or CNI for wear and friction reduction and heat penetration resistance.