Kibblewhite Precision Manganese Bronze Intake Valve Guide (+.010) - 20-2029M

Precision-machined guides
Manganese bronze guide material is softer than nickel aluminum bronze valve guides
Excellent heat conductivity which promotes long valve life
Material hardness helps support valve guide longevity
Guides can be easily reamed with a battery-operated or electric drill and finished with a high-quality ball hone
Eliminates the need for expensive honing equipment that would be required for nickel bronze valve guides
Machined to accept OEM and aftermarket seals
Great choice for the home builder
Made in the USA