KIBBLEWHITE Exhaust Valve Guide 20-20870M

Precision-machined guides, Manganese bronze guide material is softer than nickel aluminum bronze valve guides, Excellent heat conductivity which promotes long valve life, 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, Made in the U.S.A.