KIBBLEWHITE Valve Guide - Exhaust - +0.010" 40-41639

Exhaust valve guides are critical wear components that endure extreme temperatures and constant thermal cycling—choosing the right material makes the difference between a guide that lasts and one that fails prematurely. This KIBBLEWHITE exhaust valve guide combines superior heat conductivity with exceptional wear resistance, ensuring your valve train maintains precision clearances under sustained high-RPM operation. Whether you're running a street engine or pushing limits on the track, this U.S.-manufactured component delivers the reliability demanded by serious enthusiasts and professional builders.

• Ampco-45 copper alloy
• 80% copper composition
• 5% nickel reinforcement
• Superior heat conductivity
• Enhanced wear resistance
• +0.010" oversize bore
• Precision-engineered fit
• Made in U.S.A.
• Exhaust application specific
• High-temperature rated