Kibblewhite Manganese Bronze Valve Guide Harley Panhead Shovelhead

Kibblewhite manganese bronze valve guides are precision-machined engine builder valve guides for rebuilding or refreshing a cylinder head. They are made in the U.S.A. and are designed for the price-conscious builder who still wants Kibblewhite's exacting tolerances.

Key Features:

• Manganese bronze material: This is softer than premium nickel aluminum bronze, so the guides ream easily.
• Easy to finish: You can ream the guides with a battery-operated or electric drill. You can then finish them with a quality ball hone. This avoids the expensive honing equipment that tougher nickel bronze guides need.
• Good heat conductivity: This helps promote long valve life.
• Seal compatible: The guides are machined to accept OEM and aftermarket valve seals.
• Precision machined: Kibblewhite holds tight tolerances on every guide.
• Intake and exhaust options: Several outside-diameter sizes are offered, including standard and oversize.

Manganese bronze guides give a cost-effective, easy-to-install alternative to premium C630 nickel aluminum bronze guides. They wear somewhat less durably than C630, but they are a practical choice for street rebuilds and budget-minded engine builders.