KIBBLEWHITE Valve Guide 40-40420

Valve guide wear is one of the most overlooked causes of oil consumption and compression loss in high-performance engines. The KIBBLEWHITE Valve Guide 40-40420 uses premium Ampco-45 composition to deliver the thermal conductivity and wear resistance your engine demands, ensuring consistent valve sealing and extended service intervals even under sustained high RPM operation.

Built from a proprietary copper-nickel alloy and manufactured in the USA, this guide handles the thermal cycling and lateral forces that stock guides simply cannot tolerate. Whether you're rebuilding a race engine or restoring a vintage performance build, this is the precision component that separates a reliable powerplant from a maintenance headache.

• Ampco-45 alloy material
• 80% copper content
• 5% nickel content
• Exceptional heat conductivity
• High wear resistance
• Made in USA
• MPN: 40-40420