KIBBLEWHITE Valve Guide - Intake - +0.010" 40-41629
Part Number: 09263392Description
Valve guides wear faster than most engine components, especially under sustained high-RPM operation or boost pressure. A worn intake valve guide introduces excessive valve-to-seat play, killing compression, leaning out the fuel mixture, and allowing oil to seep into the combustion chamber. The KIBBLEWHITE Ampco-45 intake valve guide eliminates that slop with a precision-engineered fit and material composition designed to outlast factory guides in demanding racing and high-performance applications.
This +0.010" oversize guide is constructed from Ampco-45 bronze, a copper-nickel alloy that dissipates heat away from the valve stem faster than cast iron or aluminum alternatives. The high copper content (80%) delivers superior thermal conductivity, while 5% nickel reinforces wear resistance against the constant friction of valve actuation. The result is a guide that stays dimensionally stable across temperature swings and resists galling even under aggressive cam profiles or forced-induction loads. Manufactured in the U.S.A., this guide meets the precision standards required for serious engine builders and professional racing operations.
- Ampco-45 bronze construction
- 80% copper content
- 5% nickel alloy
- +0.010" oversize
- Superior heat conductivity
- Enhanced wear resistance
- Precision-engineered fit
- U.S.A. manufactured
- MPN: 40-41629
- Intake application
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