KIBBLEWHITE Valve Guide - Big Twin 20-4323C

Valve guide wear is one of the most common causes of oil consumption and reduced compression in Big Twin engines—and a worn guide can cascade into far more expensive repairs down the line. The KIBBLEWHITE 20-4323C replaces worn guides with a precision-machined cast iron component designed to handle modern no-lead fuel while maintaining tight tolerances for any valve-stem material. This is a straightforward way to restore proper valve sealing and engine efficiency without a full top-end rebuild.

Whether you're rebuilding after high-mileage wear or preparing an engine for sustained performance, this guide delivers the OEM-quality fit and durability that serious mechanics expect.

• Cast iron construction
• Precision-machined tolerances
• Compatible with no-lead fuel
• Accepts any valve-stem material
• Big Twin fitment
• MPN: 20-4323C
• Made in U.S.A.
• Bolt-on replacement