Kibblewhite KPMI, intake/exhaust valve guide. C630 bronze. +.001″

Description

KibblewhiteKPMI, intake/exhaust valve guide. C630 bronze. +.001″  524314

fits  84-99 Evo Big Twin; 99-04 Twin Cam; 86-03 XL Sportster (NU)

C630 bearing bronze is a tough nickel-aluminum-bronze alloy. It is not as durable as cast iron but typically used in high performance and racing applications where rapid heat transfer from the valve to head is important. Note: Standard non-oversize dimensions (for reference only) are 0.5620″ O.D. (14.27mm); 0.3090″ I.D. (7.85mm); 2.00″ OAL (50.8mm).

 

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